Size: 79*21mm, Color: Black and silvery, Type: Bicycle Wheel Repair Tools, Net weight: 123g, Package Included: 1PC Crank Puller Tool. Features: Brand new and high quality, Suitable for square tapered crank sets, Extended ejector for removing chain-rings and crank, Easy to install and use. Universal bike crank puller. It is ideal for any home bike mechanic. A necessary tool for outdoor biking, Practical and more convenient. To use: Remove the bolt in the crank arm, Screw the lower black part of the tool into the crank until tight, Screw in and continue to tighten the silver piece of the tool until the crank starts to move.