Features: Quality Design: Aluminum alloy material, high strength, high hardness, CNC finishing, anodizing, laser laser, can fix various shafts, bearings and flywheel sleeves, with bridge fixing pieces and magnets, making the clamp easy to use. Grooved Design: Multi-Groove pads have several round grooves. Multi-groove design provides a number of highly useful holding slots to keep items in place. Clamp openings are available in 4, 5, 9, 10, 12, 14, 20, 25, 28.6, 30 and 36mm, plus a 1" hex removal flywheel, including jaws for securely gripping hydraulic hoses. Simple to Use: Embedded magnets attach to the steel vise jaws and hold them firmly in place and work with most bench vises, clamps, drill press, and more. Non-Marring: The multi-groove vise jaw protectors will work with most bench vises and will prevent marring of more delicate surfaces such as soft metals and wood. Best Uses: Great for DIY projects, arts and crafts, jewelry makers, gun smithery, golf clubs, holding delicate objects and damage free assembly and repair. Specifications: Product Name: Bicycle multifunctional fixture Material: Aluminum alloy Size: 1576821mm Color: black, blue Weight: About 229g Packing: 7023200mm Notes: 1. Due to the effects of light and shooting angle, the actual color of the item may slightly differ from the color shown on the picture. 2. Due to manual measurement, please allow 1-3cm measuring deviation.Thank you for understanding! includes: A pair of clamps