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Cheat Sheet - Test Fit Card

Cheat Sheet - Test Fit Card

Regular price $15.99 USD
Regular price Sale price $15.99 USD
Sale Sold out

Not sure what size bearing or pivot a knife uses?

Use the Test Fit Card as a cheat sheet to quickly determine knife pivot size and bearing ball size. Simply insert the cage bearing or pivot barrel from the knife into the different sized slots and holes to figure out which their sizes. 

The Test Fit Card is machined from 6061 aluminum and the engravings are filled with enamel paint.


1.75" wide x 2.75" long x 0.100" thick

Test for the following sizes

Bearing sizes: 3/32", 1/16", 3/64" (1.2mm), 1mm and 2mm

Pivot sizes: 1/8", 3/16", 1/4", 4mm, 5mm, 6mm

Instructions for use

Find Pivot Size: Starting with the smallest hole, attempt to insert the pivot barrel into each hole until the barrel is able to pass through the hole.

Find Bearing Size: Starting with the smallest slot, attempt to insert the cage bearing through each slot until the bearing is able to pass through the slot. 

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Customer Reviews

Based on 50 reviews
Gary Royal
Test fit card

Very handy little tool.

Cool product

Simple, easy to use. Makes bearings easier to order.

Jason Gidluck
Cheat sheet

Takes all the guess work out of it

JP Rollin
Solid little tool

I don't know why, but I expected the tool to be a bit bigger. (It is smaller than a credit card) Nevertheless, the material is great, it is accurate and will certainly last a lifetime.

Gregg Caughran
Skiff service

Was great and timely