Metal bond diamond polishing pads are sintered by diamond and metal powder, which can be used for concrete and terrazzo rough grinding. 4 Inch Metal Bond Diamond Grinding Pads Features of metal bond diamond polishing pads: Unique metal bonding agent, strong grinding force, high efficiency, and no chipping.High wear resistance and long service life.Suitable for rough grinding, and is an ideal for rough grinding of the cement floor, concrete, terrazzo and etc. Parameter: Size: 4 inchGrit: 30#, 60#, 120# Velcro and without Velcro are available. If You Want To Inquire About The Product, Please Leave A Message To Us. Please enable JavaScript in your browser to complete this form.Name *Email *Message *CommentSubmit