Sharper knives, every visit — measured, not assumed.
Cozzini Bros statistically tests over 100,000 knives every month using AQL sampling, Delrin sharpness checks, and CATRA performance testing. Your kitchen gets sharp, safe, consistent tools — backed by proof.
Two independent quality signals, watched continuously
The Delrin tracker monitors network sharpness across every sharpening center. CATRA testing measures cutting performance and edge retention each month.
Network defect rate (Delrin)
March 2026 CATRA snapshot
| Sharpening center | ICP | CER |
|---|---|---|
| Boardman | 68.97 | 337.60 |
| Cerritos | 69.63 | 318.75 |
| Elk Grove | 59.89 | 263.60 |
| Hopewell | 53.77 | 268.14 |
| Houston | 59.95 | 336.27 |
| Orlando | 45.42 | 204.02 |
| Pineville | 42.23 | 248.52 |
| Stockton | 33.33 | 196.63 |
| Tukwila | 61.95 | 397.68 |
| Cozzini overall | 55.02 | 285.69 |
What AQL means for your kitchen, every visit
The program is built around three things your team actually feels on the line.
Sharp from the first cut
Every knife passes Delrin sharpness tests at the heel, middle, and tip before it leaves the sharpening center. If any one of them slides, it does not ship.
Consistent every visit
Statistical sampling at scale keeps the standard from drifting. What we delivered last month is what we will deliver this month — backed by data, not promises.
Caught before the line
Out-of-spec sets are corrected at our sharpening center, not discovered by your team during prep. We would rather find the problem than let your line discover it.
The 3-step quality cycle behind every set
Sample, test, correct — every batch, every center, every cycle.
Sample at scale
Structured statistical pulls on every batch — over 100,000 knives a month. Quality is measured, not assumed.
Test against spec
The 10-point AQL check runs on every sample: cleanliness, visible defects, and three Delrin sharpness tests at heel, middle, and tip.
Correct, then confirm
Out-of-spec knives are fixed before delivery. Next-cycle data confirms the fix is holding — improvements have to stick, not just happen.
Every sample. Every cycle.
Two verification checks, five visual checks, and three sharpness tests — before the knife is allowed to leave the sharpening center.
Wrong type or handle color
The physical knife is verified against the inventory record. Mismatches are flagged immediately.
Cleanliness
Knives must be free from residue, rust, or debris. If it is not sanitary, it does not pass.
Broken tip
Chipped, bent, or missing tips are rejected — a damaged tip compromises safety.
Bent blade
Warped blades affect cutting accuracy and are pulled for correction.
Handle abrasion
Rough spots or deep scratches caused by machine contact are flagged.
Blade abrasion
Visible scuffs or scratches from the stone are flagged as defects.
Burn marks
Discoloration indicates overheating during sharpening — which can weaken the edge.
Heel Delrin test
The heel must grip the Delrin stick instantly. Sliding indicates a dull area.
Middle Delrin test
The center must “bite.” If it slides, the edge is not sharp enough for service.
Tip Delrin test
If the tip slides instead of gripping, the knife is rejected and re-sharpened.
What you can expect from us, every visit.
AQL is not a marketing badge — it is the operating standard behind every Cozzini Bros sharpening center. Here is what that means for your team.
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✓
Sharp, safe, sanitary sets backed by the 10-point AQL check before the truck leaves.
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✓
Out-of-spec corrected before delivery — not after your team finds it on the line.
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✓
Reporting on request — multi-unit groups can ask for trend visibility on Delrin and CATRA performance.
