DOITOOL Metal Glasses Replacement Arm 1 Pair Universal Glasses Replacement Arm Glasses Frame Leg Sunglasses Arm for Glasses Repair Black home2023 fixed buttonThe design of fixed healthDE_Nov2023 fixed buttonThe design of fixed button So that you can't using it to grinding stone knife directly Type: Abrasive Pad We recommend using the Aluminum master lap for diamond coated flat lap disk All our diamond flat laps disc have a 1 2" arbor hole and are intended to be mechanically clamped to a Master Lap Detailed workmanship pays great attention to every detail to give this replacement arm a stylish and attractive look Do not pinch your head and reduce metal contacts between ears and temples