Features: Make of 45# Steel materials, corrosions-resistance, highly strength, not easy to break, stable, practical. Bicycles Bottom Bracket Removers can used with either 24mm nut, Wrenchs / adjust able spanners. Suitable for most 20 teeth splined type bottom bracket and Standard Square tapered cranksets. The tool for removing the crank will help you maintain and repair your bicycles better. The small size allows for convenience storage, and easy to use. Specifications: Materials: 45# Steel Size: As Show in the Picture Package Includes: 1pc Crank Pullers 1pc Bottom Bracket Removers 1pc Bottom Bracket Wrenchs note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.