This IceToolz crank puller for disassembling the crank arm is made of Cr-Mo steel. The crank puller is equipped with a socket 8mm wrench and a combined socket wrench 14mm- 15mm. This makes the crank puller plus cap also suitable for the hollow shaft. This crank puller is a handy compact tool to loosen the crank from the bottom bracket. On some bikes, the crank is secured with an Allen bolt. On others, the 14mm (or 15mm) nut is hidden behind a decorative cap. For all cases, the right tool is available with this IceToolz taker. The crank puller itself has an extra cap (the orange cap) for when a hollow shaft is used. Specifications: Color: black, silver Material: steel Weight: 160 grams Suitable for: ISIS & Octalink