Check the listing for details. 3Pack! Diamond Grinding Discs for Bolt-on Grinders for SOFT Surface Grit 120/140. Condition: New. Listed at 55.95 USD. 6-pack! Diamond Grinding Discs For Bolt-on Grinder, HARD Bond For SOFT Concrete Surface, 120/140 Grit The premium quality Diamond Grinding Discs offers the best lifetime available on marketTrapezoidal diamond grinding tooling discs/ pads designed for bolt-on floor grinding machinesDiamatic - BGS-435 / 555 / 735 / 780Klindex - ExpanderCPS - G170 / 210 / 250 / 290 / 320DInnovatech / Bartell - Predator 1800 / 2400 / 32D / 32NDXHard Bond: for Soft to Medium-soft concrete.Rectangle segments size: 40 x 12 x 12 mmTwo grinding segments per plate.Grit Size: 120/140For wet or dry use** Soft bond is best in medium to hard concrete, or when the priority is on speed **Standard bond is best in medium to soft concrete, or when the priority is on life.**Rectangle segments are 40 mm long ,12 mm wide and 12 mm tall.**2 rectangle segments per plate **Color coded based on grit** Grit size 18-30: Coarse surface finish Grit size 30-60: Medium surface finish Grit size 60-100: Fine/smooth surface finish Grit size 100-150: Ultra Fine/smooth surface finish Concrete Hardness and Aggregates Types: