Free US shipping on orders over $99

Cheat Sheet
Test Fit Card


Regular price $12.99

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. 

Customer Reviews

Based on 15 reviews
Sondre Sæther
Cheat sheet

Good quality product

Test fit card

The bearing and pivot test fit guide works Great Putting skiff in all my knife test will take them Thankyou Again

Nathaniel Printz
Very helpful

The test fit card works well! I was able to find the size I needed for my Winter blade Factor and others. Thanks!

Test fit card

Works well, makes it much easier to identify which bearings I need to order for my knife.

Spyder G
Test for card skiff bearings

Absolutely awesome it take the measuring and guess work out of it I have been on a skiff bearing swap out with all my knives that have bearings. Absolutely recommend. Thank you very much