Bike Crank Extractor Puller + Bottom Bracket Remover Removal Tool Set New Professional Tools Designed to Last Material:Carbon steel Professional Quality Crank Extractor – This tool is used to remove SQUARE type crank arms, all you need is either a 5/8 or 16mm spanner or just an adjustable spanner – This tool is incredibly simple to use and requires no rocket science. 1. Remove the bolt in the crank arm 2. Screw the lower black part of the tool into the crank till tight 3. Screw in and continue to tighten the silver piece of the tool until the crank starts to move Bottom Bracket Remover – Fit for any other brand splined bottom bracket – Suitable for any 20 teeth splined type bottom bracket -generally the type used for any bike with a suntour, truvativ chainset. – The tool can be used with either a 24mm socket, wrench or an adjustable spanner Package Includes: 1x Crank Extractor 1x Bottom Bracket Remover