Quick and easy to use. High hardness, high torque, quality assurance, durable and long service life. Material: 6061 aluminum alloy + steel (drill ring) + brass (nut), Drill ring material: HRC50° steel Anodic oxidation treatment surface & HRC50° steel material ensures good working performance and helps improve efficiency. Adjustable stop and drill precisely, drill an evenly spaced hole along the length of the wood. Suitable wood size: 17-50mm. Product Description It is a good tool set for furniture makers and woodworking enthusiasts. Adjustable to clamp on different thicknesses of wooden boards from 17mm to 50mm. Specifications: Material: aluminum alloy 6061 (drill guide), steel die (bushing) Drill bushing material: HRC50° steel Material: aluminum alloy 6061+steel (drilling bushing)+brass (nut) Processing Surface: Anodic oxidation treatment Surface Anodic oxidation treatment & HRC50° steel material ensures good working performance and helps improve efficiency Suitable wood size: 17-50mm Positioning bush: 6/ 8 /10 mm Socket size: 6 mm, 8 mm, 10 mm (3 pieces of each size) Locating pin: 6 mm, 8 mm, 10 mm Drill guide size: 23.5 × 15 × 6 cm /9.2 × 5.9 × 2.3 in Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-dadangjia