Product Description Specifications:Function:opening & closing of chainsType:special toolTechnical Information:Material:steelCompatibility:Chain Size: 1/8"3/16" Single Speed Gearing: 5-speed - 12-speed12-speed SRAM AXS11-/12-/13-speed Campagnolo (closing only, not for opening)Features:chain tool adjustable to any chain widthinterchangeable tipManufacturer Number:CT-3.3 Contents:1 x Manufacturer: Park Tool Company 1185 Eagle Lake Rd Shoreview MN 55126 USA info@parktool.com Distributor: GROFA Action Sports GmbH Otto-Hahn-Straße 17 65520 Bad Camberg Germany info@grofa.com