The 3M 00051144451197-31196 is a 18" diameter cartridge roll mandrel. It is designed to be used with an abrasive roll and allows the operator to finish hard to access areas of workpieces. 3M 00051144451197-31196 Features:Shank of the mandrel is secured into the collet assembly or drill chuck of a rotary power toolMandrel enables access to tight spaces with a cartridge rollComes in various pilot diameters and lengths to fit different cartridge rollsShank must match the size of the power tool collet or drill chuckPilot diameter must match size of cartridge roll3M 00051144451197-31196 Specifications:Series: 45119Product Type: Cartridge Roll MandrelOverall Width: 1inOverall Length: 69.85mmOverall Diameter: 18inFor Use With: Securing Cartridge Rolls to Tool, Specialty AbrasiveShank Size: 14inMaximum Speed: 24000rpmApplications: Marine, Metalworking, Transportation & Heavy Equipment, Primary Metal, General Industrial, Paint Preparation, MRO, Aerospace, AOEM, Woodworking, Cutting Tool Manufacturing, CompositePackage Quantity: 25CA