Specifications: Suitable for square tapered crank sets. Extended ejector for removing chain-rings and crank. Easy to install and use, ideal for any home bike mechanic. A necessary tool for outdoor biking. Practical and more convenient, helps you get out of troubles. Type: Crank Puller Tool Material: Metal Color: White Style: Fashion Features: Bicycle Accessory, Durable, Easy to Use Length: 8cm/3.15" (Approx.) Use Method: 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. Notes: When you disassemble bike teeth, please match wrench. Also applicable to 16mm fixed wrench with 14mm socker removal. Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Crank Puller Tool