What Homeowners Should Know About ANSI Grade 1 vs Grade 2
ANSI lock grades are one of the most practical frameworks a homeowner can understand when evaluating door hardware, and the difference between Grade 1 and Grade 2 has a direct impact on how well a home resists forced entry, wear, and long-term mechanical failure. The American National Standards Institute, working alongside the Builders Hardware Manufacturers Association (BHMA), established a graded testing system that rates locksets on cycle endurance, door strike force resistance, and finish durability. Knowing where each grade fits — and where it falls short — removes much of the guesswork from lock selection, replacement, and professional service decisions.
What Homeowners Should Know About ANSI Grade 1 vs Grade 2 Overview
The ANSI/BHMA grading system produces three tiers: Grade 1, Grade 2, and Grade 3. Grade 1 represents the highest standard within the system, Grade 2 sits in the middle, and Grade 3 covers the lowest threshold. For residential applications, most discussions center on Grade 1 and Grade 2, because Grade 3 hardware is generally considered inadequate for exterior door security and is rarely recommended by licensed locksmiths or security consultants.
Grade 1 locks are tested to withstand 250,000 open-and-close cycles for knobs and levers, and 250,000 cycles for deadbolts as well. They must also survive a door-strike test of 360 pounds of force applied to the latch or bolt. Grade 2 locks are tested to 400,000 cycles for some lever categories but typically rated at lower force-resistance thresholds — around 250 pounds for the strike test depending on the hardware category. The cycle counts alone do not tell the full story; material quality, bolt throw length, anti-pick pins, and reinforced strike plates all contribute to real-world performance alongside the grade designation.
A common misconception is that Grade 1 is strictly a commercial standard while Grade 2 is appropriate for homes. In practice, Grade 1 deadbolts and handlesets are widely available for residential use, are priced accessibly, and are installed daily in single-family homes, condominiums, and rental properties. The commercial versus residential lock standard distinction matters more when discussing mortise locks, electrified hardware, and exit devices — categories with their own additional certification requirements beyond the base ANSI grade.
Key Factors in the ANSI Lock Grades Comparison
When comparing ANSI Grade 1 versus Grade 2 hardware side by side, five factors matter most to homeowners: bolt throw length, anti-pick and anti-bump characteristics, strike plate construction, material composition, and compatibility with smart lock or keypad upgrades.
Bolt throw refers to how far the deadbolt extends into the door frame when locked. Grade 1 deadbolts are required to have a minimum one-inch throw; Grade 2 bolts may have a shorter throw in some product lines. A one-inch throw into a reinforced strike plate anchored with three-inch screws into the door frame stud is a combination that significantly increases kick-in resistance compared to a shorter bolt paired with a standard strike plate using short screws.
Anti-pick pins, security pins, and spool pins are internal cylinder features that resist lock picking and bumping. Grade does not directly mandate a specific pin configuration, but manufacturers producing Grade 1 hardware typically incorporate higher security cylinder designs as part of meeting the overall grade specification. Homeowners comparing products should look at both the ANSI grade label and whether the lock is also certified under UL 437 or carries additional ANSI/BHMA security ratings, as these provide a fuller picture of resistance to covert entry techniques.
Material composition affects both strength and longevity. Grade 1 hardware tends to use solid brass, solid stainless steel, or zinc alloy cores with higher density. Grade 2 products often incorporate more lightweight zinc alloys or hollow metal components that meet the testing threshold but may show wear faster under heavy daily use. For high-traffic exterior doors — a front door used by a family of four, for example — Grade 1 hardware will generally hold finish and mechanical function longer before requiring service or replacement.
Costs and Risks
The cost difference between Grade 1 and Grade 2 locks is meaningful but rarely prohibitive. Retail prices for a Grade 2 deadbolt from a reputable manufacturer typically range from $30 to $70. A comparable Grade 1 deadbolt from the same manufacturer often falls in the $60 to $140 range. High-security Grade 1 locks with patented key control, restricted keyways, or additional certifications can reach $200 to $400 per lock, though those products are more commonly specified in commercial or high-value residential applications.
Professional installation adds labor to the equation. A locksmith installing a deadbolt — whether Grade 1 or Grade 2 — will typically charge for the service call plus the hardware if supplied by the technician. When a homeowner supplies the lock, the labor cost covers drilling (if needed for a new installation), alignment, and testing. Average: $75 · Range: $50–$150 · Travel: free in service area. Choosing Grade 1 hardware adds little or nothing to the labor cost; the incremental investment is almost entirely in the hardware itself.
The risk of choosing Grade 2 hardware for an exterior entry door is not that the door becomes immediately vulnerable, but that the margin of security narrows. A Grade 2 deadbolt with a short bolt throw, installed in a weak door frame without a reinforced strike plate, creates a compounding risk profile. Each individual weakness may be minor, but together they lower the effort required for a forced-entry attempt. Locksmiths and insurance adjusters both note that most residential break-ins involve kick-in attacks on the door frame rather than lock picking, which places the strike plate and bolt throw at the center of the security equation — both of which favor Grade 1 specifications.
Deferred maintenance carries its own risk category. A Grade 2 lock that has degraded — sticky bolt throw, worn cylinder, loose trim — may technically still lock but will fail under stress faster than a properly maintained Grade 1 product. Homeowners who have not replaced exterior hardware in more than a decade should have a locksmith evaluate both the lock grade and the current mechanical condition before assuming the existing hardware is adequate.
When to Call a Locksmith
Several specific situations call for professional locksmith involvement rather than a DIY hardware swap. The first is when a homeowner is unsure whether their current locks are Grade 1 or Grade 2. Manufacturers are not always consistent about labeling hardware clearly on the product itself, and packaging is often discarded. A licensed locksmith can identify the grade, brand, and cylinder type by inspection and advise on whether the existing hardware meets a reasonable security standard for the home’s location and risk profile.
The second situation is a new home purchase. Rekeying or replacing locks after taking possession of a home is standard practice, and that moment provides an efficient opportunity to evaluate the grade of all exterior hardware at once. A locksmith completing a rekey service can note any Grade 2 or Grade 3 locks and provide a cost estimate for upgrading to Grade 1 while already on-site. Bundling a security evaluation with routine service reduces travel costs and gives the homeowner a consolidated view of their entry point hardware.
Third, if a door has experienced an attempted forced entry — even one that did not succeed — a locksmith should inspect the frame, strike plate, and lock before the homeowner considers the situation resolved. A failed kick-in attempt often damages the door frame mortise even when the bolt holds, creating a weakened point that will fail more easily in a subsequent attempt. This kind of structural assessment is outside the scope of simply swapping a lock and requires the diagnostic eye of a technician familiar with how different grades perform under load.
Fourth, when a homeowner is integrating a smart lock or keypad deadbolt, Grade 1 is strongly preferred over Grade 2 as the base hardware. Smart locks add electronic convenience but do not improve the physical bolt or strike plate strength. Installing a smart lock on a Grade 2 or Grade 3 deadbolt chassis provides digital access control without upgrading the physical security, which can create a false sense of protection. A locksmith installing smart hardware should confirm that the physical deadbolt mechanism itself meets Grade 1 specifications, or recommend a smart lock product that includes a Grade 1 certified cylinder and bolt as part of the unit.
Recommended Next Steps
Homeowners who want to take a practical approach to the ANSI lock grades comparison can begin with a simple inventory. Walk each exterior door and note the brand name on the lock face or cylinder. Most major manufacturers — Schlage locks, Medeco, Mul-T-Lock lock products, Yale, Kwikset — list ANSI/BHMA grades on their product specification pages, making it straightforward to cross-reference a brand and model against published grade data. If the brand is unidentifiable or the lock is a builder-grade product with no visible manufacturer marking, that is itself a signal to schedule a professional evaluation.
After completing the inventory, prioritize exterior doors by traffic and exposure. The front door and any door with direct access to an attached garage are the highest priority replacement or upgrade candidates. Back doors and side entries that are screened by fencing or landscaping may present lower immediate risk, but should not be left with Grade 3 hardware indefinitely. A staged upgrade approach — front door first, remaining exterior doors within twelve months — is a practical plan for homeowners managing a renovation budget.
Strike plate reinforcement is a low-cost upgrade that should accompany any lock replacement regardless of grade. A standard builder-grade strike plate uses half-inch screws and provides minimal resistance to kick-in force. A reinforced strike plate with three-inch screws anchored into the door frame stud adds meaningful resistance at a materials cost of under twenty dollars per door. This upgrade takes less than fifteen minutes for a locksmith to complete and is often bundled with lock installation at no additional labor charge.
Finally, homeowners should keep a record of the lock grade, brand, model, and key series for each exterior door after any installation or replacement. This information simplifies future rekeying, key duplication, and warranty claims. It also ensures that if a lock needs emergency service, the responding locksmith has accurate information about the hardware before arriving on-site — which reduces service time and the likelihood of a lock being drilled unnecessarily. A basic photograph of each lock’s product label, stored in a home document folder, is sufficient for this purpose.
More to explore: Cost Factors for How to Read a Lock Grade, Lock Grade Selection.
Call Low Rate Locksmith
Low Rate Locksmith provides 24/7 mobile locksmith service across the US and Canada, including lock grading evaluations, deadbolt installation, rekeying, and smart lock integration. Whether a homeowner needs a straightforward Grade 1 deadbolt upgrade or a full exterior door hardware assessment, licensed technicians are available around the clock. Call (833) 439-8636 to schedule service or request an immediate dispatch — travel is included within the service area.