Bicycle Chain Fixer Bike Chain Holder Tensioner Quick Release Lever Convenient Bicycle Chain Keeper Cleaning bike accessories Description: Product name: chain tensioner Material: aluminum alloy, engineering plastics, stainless steel Net weight: 74g for basic version, 80g for quick release version Features: High-strength alloy main body, hard and compressive, H-shaped chain groove structure, avoid chain skipping when changing speed, small size design, easy to carry, magnetic absorption design, easy to store. Specifications: Using aluminum alloy sliding rod design, it can slide smoothly left and right H-shaped chain groove design does not jump chain H-shaped chain groove structure avoids chain skipping during shifting Magnetic storage design The flywheel inlaid magnet can be adsorbed on the iron tool wall, and there is a magic buckle placement slot, which can absorb a pair of magic buckles for backup Exquisite, compact and convenient Small size design, easy to carry when going out, can be put in trouser pockets, tail bags, backpacks, can fix the chain, avoid the chain slack, just scratch the paint during transportation Package Included: chain tensioner*1