Sturdy Material: 2 in 1 drill guide made of 6061 aluminum alloy with excellent surface oxidation treatment, with high hardness, wear-resistant, rust-proof, strong, durable and excellent for use. Adjustable Design: The flat head hole punch locator has two locator sides for drilling with a horizontal adjustment range of 13-81mm and a longitudinal adjustment range of 12-27mm. The scale is clearly visible on each side, easy and convenient to locate. Practical Drill Sleeves: This drill bit locator comes with 4pcs 6/8/10/12mm drill sleeves, they can meet your different drilling needs and change the adapter quickly. The pocket gauge set can help you drill the bevel hole quickly and work efficiently. Wide Application: High precision scale, easy to adjust the drilling height and hole depth, perfect for woodworking projects at home, professional or general commercial use, such as carpenters, contractors, etc.