The Bike Repair Tool Kit is designed for repairing bike bottom brackets, allowing you to install, loosen, or tighten them. It can also be used to remove the spline teeth mouth side plate and crank. Compatible with any brand or type of bottom bracket. Easy to operate and use. The tool requires either a 5/8" or 16mm spanner, or an adjustable spanner. Screw in and continue tightening the silver part of the tool until the crank begins to move. Tighten the lower black part of the tool into the crank securely. Type: B Color: Black + Silver Material: Metal + Plastic Package Contents: 1 x Bicycle Crank Remover Kit (without top hat) Note: The package includes only the items listed above; other products are not included. Light reflection and differences in display screens may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.