Features and Benefits: Long lifespan/ Flexible rubber/ Good quality hook and loop prevents any separation of the backer itself/Quick and convenient change/ Excellent rigidity Diameter 4", Brass arbor with 5/8" 11 Thread Max RPM 4500 Applied Machine: Auto grinding machine,angle grinders,Hydrostone-flat Grinder Package Contains a 4 Inch hook and loop backer pad with 5/8"-11 Thread ComeFloor 4 Inch Rubber Backer Pad Hook and Loop Rubber Backing Pad for Countertop Wet Dry Polishing - Arbor 5/8" 11. It's made from rubber and super strengthened adhesive prevents any separation of from the rubber backer itself.The velrco is strong enough to hold the polishing pad.It's a useful diamond tool accessory. Size Information Diameter(Size): 4”/100mm Connection:Thread 5/8”-11 Features and Benefits Long lifespan/Flexible rubber/Good quality velrco prevents any separation of the backer itself/Quick and convenient change/Excellent rigidity Applied machine Auto grinding machine,angle grinders,Hydrostone-flat Grinder Package Contents Carton box for each pieces About ComeFloor ComeFloor has 10 years' history.Our main products are various of specification diamond saw blades,flexible polishing pads,diamond grinding wheels,and abrasive brushes,etc.Our tools are popular among stonemasons,marble and granite fitters,concrete cutters,bricklayers etc.We aim at provide best quality,suitable price and excellent service to our customer.And we hope you will be satisfied with our service.