Professional Bike Bicycle Cycle Crank Extractor Puller Bottom Bracket Remover Removal Spanner Repair Tools Kit Includes one crank extractor, one bottom bracket remover and one 16mm spanner. The Crank Extractor is used to remove square type crank arms, all you need is either a 58 or 16mm spanner or just an adjustable spanner. Suitable for Standard Square Tapers. Suitable for any 20 teeth splined type bottom bracket - generally the type used for any bike with a suntour, shimano, truvativ chainset. The Bottom Bracket Remover can be used with either a 24mm socket, wrench or an adjustable spanner. Fit for any brand type bottom bracket.