JINXIU Greater strength Better surface finishesMade from high-quality cold-rolled steel the crank puller and bottom bracket tool has greater strength and hardness, smooth and shiny surface that is free of rust, making it more suitable for use in high-stress applications. Useful Tool to Take Crank Arm off Use this useful tool-crank puller to change the crank, make sure your bikes crank be e properly maintained to keep your bike operational. How to Use Start by unscrewing the tool all the way until the end is fully retracted. Then line up the crank extractor with the threads. Turn clockwise on the drive side it comes off. Repeat on the left side. Standard Size for Most BikesBottom bracket removal tool is suitable for all bottom bracket lengths, unlike others which limit the bottom bracket length. Our products dont need to worry about the length of the center axis and can be disassembled more easily. Worked Perfectly Precisely machined teeth, the tool grips the bearing shell perfectly and does not slip. Compact design, so it can be secured against slipping by means of a crank screw and washer on the axle and the torque is where it should be. Features: High quality carbon steel material makes bike crank puller durable and sturdy to use. Specially designed to remove the cranks from the bikes bottom bracket. It is ideal for bike mechanics. More practical and convenient. Helps you troubleshoot quickly. The thread of this tool is very hard so it wont damage the thread of the cranks. Specification: size: as show Material:Cold Rolled Steel Color: Black Package includes: - 1 crank puller - 1 bottom bracket tool