for durable to use, 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. Small and handy for any bike owner to keep in the toolbox.Simple to use, suitable for beginners. Colour:Red+silver Material:metal Size: 13 x 2cm Package Contents: 1 * Bike Bicycle Crank Extractor Puller 1 * Bike Bottom Bracket Remover Removal Tool 1 * 16mm Spanner Only the above package content, other products are not included. 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 +/- 1-3cm.