 75mm Metal Slitting Diamond Wheels These slitting discs use bonded diamond to offer a great alternative to 3" slitting discs, typically outlasting 50 of them. From: £10.70 |  |  |  Tile Drill Bits For Angle Grinders These diamond drill bits fit angle grinders and cover sizes from 25mm right up to 117mm, including most sizes for LED cut-outs. They quickly drill porcelain tiles as well as granite. From: £10.50 |  |  | |