Product Description Accessories for chainrings: chainring bolts by Wolf Tooth Components This chainring bolt set, optimised for single chainrings, has a 4 mm hex on the bolt and a 6 mm hex on the nut. A wrench is therefore not necessary. The bolts are 6 mm long and thus fit all single chainrings that do not have threaded holes. Technical Information:Material:aluminium (7075-T6)Size:M8Length:6 mmTool Drive:4 mm hexagon socket (screw), 6 mm hexagon socket (nut)Compatibility:all Wolf Tooth 4-arm chainrings with threadless boltssingle 4-arm chainrings of other brandsFeatures:6 - 7 Nm tightening torque, grease thread lightlyMade in the USAColour Index:nickel:shiny silverManufacturer Numbers:black:4CBCN06BLKsilver:4CBCN06SILred:4CBCN06REDblue:4CBCN06BLUgreen:4CBCN06GRNnickel:4CBCN06NIorange:4CBCN06ORGpurple:4CBCN06PRPgold:4CBCN06GLDgrey:4CBCN06GRYContents:4 x Wolf Tooth Components 6 mm chainring bolts Weight: black: 8 g Manufacturer: Wolf Tooth Components 6400 W 105th St Bloomington MN 55438 USA info@wolftoothcomponents.com Distributor: Cosmic Sports GmbH Leyher Straße 47 90763 Fürth Germany info@cosmicsports.de