Firmly Fixed: The stopper features anti-slip lines for secure manual tightening. The inner nylon construction provides a strong lock, preventing looseness and reducing wear on the drill's locking component. Aluminum Alloy: The limiter is constructed from durable, lightweight aluminum alloy, offering a sleek and robust design. Adjustable Inner Diameter: The stopper's inner diameter is adjustable, allowing use in multiple positions and compatibility with various drill bit sizes. Precise Drilling: Enables accurate control of drilling depth, enhancing work precision, quality, and efficiency. Wide Range of Applications: Suitable for use in furniture assembly, tiles, wood, metal, plastic, and brick. Item Type: Adjustable Drill Stop Collar Material: Aluminum Alloy Color: Red Specifications: 2-5mm Package Contents: 1 x Drill Depth Stop (other items not included) Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3cm.