description back up pad within the range of polishing pads for natural stones, rubi has a semi-flexible holder, particularly suitable for secure fixing of all polishing pads in the range. california proposition 65 warning. features this disc pad holder is designed to help users quickly and easily change rubi and other brands 4" polishing pads 5/8" back mounting size to use with angle grinder easy to set up specifications acme tools brand name rubi tools acme tools part number 61934 assembled weight (lbs) 0.429 california proposition 65 warning required no color black color / finish black country of origin spain globaltradeitemnumber (gtin) 84137976193480 installation method in grinder internal supplier part # 61934 internet product code (ipc) 8b28fec1529 manufacturer warranty factory defects material block package contents back up pad package depth 4.134 package height 4.134 package quantity 1 package weight 0.454 package weight (lbs) 1 upc 8413797619348 used with diamond blades