How we test before we list

Every product on the Jewellery Tools catalogue is bench-tested at our Birmingham workshop before going live. This page documents exactly what that means — what we check, how we check it, and what disqualifies a product.

Most online tool suppliers don't see the products they sell. The boxes arrive at a fulfilment warehouse, get scanned in, and ship straight out when ordered. That model is fine for commodities, but it's the reason so many bench jewellers end up with hammer faces that aren't true, plier jaws that don't close parallel, or mandrels with surface burrs that mark every piece they touch.

We do this differently because we have to: our editorial team and our buyers are working jewellers and silversmiths. Tools we wouldn't put on our own bench shouldn't be on yours either.

The four-step inspection workflow

Step 1

Every new SKU arrives at our Small Heath workshop in a sample batch — typically 3-5 units of the same product, sourced from the same production run.

Step 2

Each unit is checked against a category-specific inspection list (described below) by someone who actually uses that category of tool at the bench. A hammer is inspected by someone who's been a working silversmith. Pliers are checked by a bench jeweller. Watch tools by a watchmaker. We don't have a single "quality control" person — we have a workshop of working tradespeople.

Step 3

If 1 unit in 5 fails inspection, we reject the entire production run and feed the failure data back to the manufacturer. If the rate is below that but a specific defect repeats, we flag the SKU as "watch-list" and re-inspect the next shipment more thoroughly.

Step 4

Only SKUs that pass inspection go live on the storefront. Failed shipments are returned to the supplier, redirected to lower-grade buyers, or destroyed depending on the failure mode.

What we check, by category

Hammers and mallets

  • Face flatness — checked against a precision steel ruler under raking light
  • Face hardness — tested with a file pass at the rim; a properly heat-treated face skates the file, a soft one scores
  • Handle-to-head fit — no rotation, no wobble, wedge fully seated
  • Handle wood — straight grain, no resin pockets, no green knots
  • Weight tolerance — within ±10% of nominal listed weight on a calibrated scale
  • Surface finish — no peen marks from the manufacturer's own forging hammer

Pliers and cutters

  • Jaw alignment — closed jaws meet flush along the full grip length, no light visible through the join
  • Joint action — smooth pivot with no grit, no excessive play after 100 open-close cycles
  • Tungsten-carbide tipping — secure on side cutters and end cutters, no visible solder gaps
  • Handle grip — PVC or nylon grips fully bonded, no sliding under load
  • Spring action (where present) — full return after compression, no metal fatigue cracking
  • Cutter blade edge — clean cut through 1mm hard wire without lateral deflection

Mandrels and sizing tools

  • Taper consistency — micrometer-checked at 5 points along the working face
  • Surface finish — no marks, burrs, or pits that would transfer to silver
  • Engraved size accuracy — UK ring-size marks within ±0.25 size
  • Hardening (steel mandrels) — file-skate test confirms surface hardness
  • Wooden mandrels — straight grain, no end-split, finish even and non-marring
  • Base stability — sits flat on the bench without rocking

Tweezers and soldering equipment

  • Tip alignment — fine-point tweezers meet at the exact same point with light pressure
  • Spring temper — full return to open position, no fatigue at the pivot
  • Cross-lock action — locks closed reliably, releases cleanly when squeezed
  • Charcoal blocks — visible grain structure, no large voids, faces planed flat
  • Titanium soldering picks — confirmed titanium (not stainless) — solder genuinely doesn't stick after 5 test runs
  • Third-hand and reverse-action — base mass sufficient to stay put under torch heat

Punches, stamps and disc cutters

  • Strike face — clean impression on test brass at moderate strike force
  • Hardness — strikes 50+ test impressions without face deformation
  • Disc cutter alignment — punch travels true through the bore, no rocking or binding
  • Disc cutter shear — first 5 test cuts through 0.5mm copper sheet have clean edges, no burr requiring filing
  • Letter and number stamps — character heights uniform within ±0.1mm
  • Maker's mark blanks — hardness sufficient to register on sterling silver under bench hammer

Watch tools

  • Case holders — wooden block grip without crushing case lugs at moderate pressure
  • Hand pullers — fork tips clean and parallel, no marking of dial during test extractions
  • Screwdrivers — tip thickness matches stated mm to ±0.05mm; tempered correctly (no rolling at the tip)
  • Loupes — optical quality acceptable for 10x grading work (no chromatic fringing)
  • Movement holders — fit a movement without lateral play
  • Spring-bar tools — both forked and pin ends correctly hardened

What disqualifies a product

If we find any of the following during inspection, the entire shipment is rejected and the SKU is removed from our roadmap with that supplier:

  • Counterfeit branding (claimed brand markings that don't match the genuine maker's mark)
  • Material substitution — claimed materials that don't match (e.g. stainless sold as titanium)
  • Safety risks — pre-cracked tool faces, loose grips, unsafe spring tension
  • Watermarks or branding from another supplier still visible on the product or packaging
  • Country-of-origin labels that don't match the manufacturer's claim
  • Documentation gaps — no test certificates for cutters claimed as tungsten-carbide, etc.

The honest limit of our process

We can't test every individual unit you receive against our sample. Sample-based inspection means there's always a small risk of a unit slipping through that doesn't match the sample we approved. If that happens to you, please tell us — return it for a no-quibble replacement and we'll use it as part of our next inspection of that SKU. We treat customer-reported defects as more weight than our own inspection, because you're using the tool at your bench day-in, day-out.

We also can't guarantee that a tool that's right for one bench is right for yours. "Best" depends on what you're making, how often you make it, and the bench you're working at. The buying guides on the Bench Journal exist to help you make that call. If you want bench-to-bench advice for your specific work, email info@toolsmithltd.co.uk — a working jeweller will answer, usually the same working day.

How to give us feedback

If a product you bought doesn't match the inspection standards above, that's a failure of our process and we want to know. Please email info@toolsmithltd.co.uk with the order number, the SKU, and a photo or short description of the issue. We respond within one UK working day, replace at our cost, and feed every report back into our supplier-watchlist data.

Page maintained by the Jewellery Tools editorial team. Last reviewed 20 May 2026. See also: editorial standards, about, the people at the bench.