1. Firmly Fixed: The of the stopper has anti skid lines, which can be manually tightened, the inner of nylon is easy to lock, not loose, and effectively avoids wear on the locking part of the drill. 2. Aluminum Alloy: The outer of the limiter is made of aluminum alloy, which is durable, beautiful and lightweight. 3. Adjustable Inner Diameter: The inner diameter of the stopper can be adjusted, one of which can be multiple, which can be fixed on different positions. 4. Precise Drilling: The limiter can precisely control the depth of drilling, which greatly improves the quality and efficiency of your work. 5. Wide Range of Applications: The drilling stopper can be used for furniture installation, ordinary tiles, wood, metal, plastic and brick. name:Drill Depth Stop Item Type: Adjustable Drill Stop Collar Specifications: 2-5mm 6-11mm Color: Red Material: Aluminum Alloy Package Contents: 2 x Drill Stoppers Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.