DOITOOL Metal Glasses Replacement Arm 1 Pair Universal Glasses Replacement Arm Glasses Frame Leg Sunglasses Arm for Glasses Repair Black home2023 So that you can't using sold2026 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 fixed buttonThe design of fixed button Do not pinch your head and reduce metal contacts between ears and temples Detailed workmanship pays great attention to every detail to give this replacement arm a stylish and attractive look