Universal SlackSetter Pro Chain Slack by Motion Pro. Setting chain slack properly dramatically improves chain life. Accurately and quickly measure chain slack (not used to measure chain to swingarm clearance specification). Works on most street and dirt bike applications, up to 52 mm (2") chain slack. Lightweight compact design fits easily in your tool box or road kit. Specifications: Type: Tool - Chain Units: Each Weight: 0.15 lb Features: Accurately and quickly measures chain slack Two scales measure both chain slack and chain to swingarm clearance in millimeters Setting chain slack properly dramatically improves chain life Light weight compact design fits easily in your tool box or road kit Works on most street and dirt bike applications up to 75 mm chain slack Made from engineered nylon with aluminum measuring scale Anodized laser etched precision measuring scale Refer to your owner's manual for proper chain slack and procedure Patented Design Precisely engineered to ensure ultimate efficiency Manufactured using innovative technologies Absolute quality, great durability, and solid workmanship They build specialty motorcycle tools for professional mechanics and motorcycle enthusiasts in an effort to make tasks quick, easy, and efficient. Motion Pro tools are designed and developed with the experience of Motion Pro engineers and racing efforts of Motion Pro sponsored professional race teams. In an effort to improve the process, Motion Pro tools simply add convenience and improvements to a current tools, operation or process. Motion Pro Pivot suspension vise easily mounts to any tabletop bench and provides a platform to aid in most suspension service tasks.