These bushings are used in folders and balis. The idea is to use these with a pivot and lap them to the over all length you want which would be around .001" thicker than your blade and washers stacked up. This set up ensures someone can not over tighten the pivot screws inhibiting the opening and closing of the blade.
If you are making a bali, you have the action set up exactly right. Lap this pivot length to get the precise flipping action you want. We suggest using our Pivot lap with these.
NOTE: Several bushings and a couple of our Bali style pivots are pictured for clarity of illustration. You are ordering singles of bushings only.