ITEM NAME:Bicycle Crank pullers Crank for 4-Kant Bike Tool Crank Puller L7N3 Bicycle Crank pullers Crank for 4-Kant Bike Tool Crank Puller L7N3 100% Brand new Easy to use Suitable for standard square tapers Robust design for the home bike mechanic Universal bike crank puller. This tool is easy to use and is for any home bike mechanic.You just need an adjustable spanner or a 5/8 or 16mm spanner, then: 1. Remove the bolt in the crank arm 2. Screw the lower black part of the tool into the crank until tight 3. Screw in and continue to tighten the silver piece of the tool until the crank starts to move & lt; Package Includes: 1 x Bike Crank Puller Tool Note:Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm..Universal bike crank puller. 1 x Bike Crank Puller Tool. Remove the bolt in the crank arm. Screw in and continue to tighten the silver piece of the tool until the crank starts to move & lt;. Screw the lower black part of the tool into the crank until tight.