Description: Durable: Depth Stopper, The outer rings is made of aluminum alloy, durable. Detail: Nylon inner rings, convenient effectively avoid the abrasion of the locking part of the drill bit. Convenient: The inner diameter of the stopper, which is adjustable, accurately control the drilling depth. Feature: Quickly control the exact depth of holes, and drill holes more faster and accurately. Widely Use: Perfect for drilling, precise control and unify drilling depth. Specification: Material: Aluminum Alloy  Size Chart: S: Length: 2cm/; Width: 3~3.4cm/; applicable drill size range: 5/64"~ 3/16"; suitable for 2mm~5mm . L: Length: 2.8cm/; Width: 4.9~5.4cm/; applicable drill size range: 15/64"~ 7/16"; suitable for 6mm~11mm . Package Includes: 1 Drill Stop Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on line shopping!