Product Information Materials：Iron sheet, Steel 45, Hardened BP steel wire Quality：Without flexure, fracture, shedding and rusting phenomenon               For Removal Of Rust, Paint And Dirt,For Roughening, De-burring, Stripping or Polishing Others：Hexagon screw ；1/4"(6mm) Shank；Use With Power Drill；Max RPM 450 Code Barcode Packaging Shipper Qty Size TCA5075 9328675027285 Double Blister 60 EACH 3"(75MM) TCA5100 9328675027292 Double Blister 60 EACH 4"(100MM)