Features 1、Firmly Fixed: The surface of the stopper has anti skid lines, which can be manually tightened, the inner ring of nylon is easy to lock, not loose, and effectively avoids wear on the locking part of the drill. 2、Aluminum Alloy: The outer ring 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. Specification Item Type: Adjustable Drill Stop Collar Material: Aluminum Alloy Color: Red Package List 1 x Adjustable Drill Stop Collar (For 0.24 to 0.43in Drill Bit)