Professional tool for commercial or occasional use For use with a 4-1/2" (115mm) angle grinders and sanders 40 grit flap oxide disc Perfect for removing rust, grinding of welds, parting lines on casting and carbon steels or removing rough edges on most surfaces The high grain adhesion is for a long life which outlasts conventional sanding discs With these flap discs there is no backing disc required, it fits directly onto an angle grinder Goggles should always be worn when using this tool SPECIFICATIONS - 40 Grit aluminium oxide disc - 115mm x 22.2mm disc - 4-1/2" x 7/8" - Max RPM - 13,300 - 80 M/S