High Quality: This 3 in 1 Self-Centering Woodworking Doweling Drilling Guide Puncher is made of high quality aluminum alloy and anodized for durability, wear resistance,high hardness and strength, not easy to rust or breakvery. Multi Size Bushings: Drill hole carpentry tools locator kits Comes with 6mm, 8mm and 10mm bushings for making holes of various sizes. There are 6, 8 and 10mm drill sockets on the drill stand, and there are 3 types of each, that is, 3 holes can be drilled at a time. In addition, there are 3 types of drill sockets that can accommodate 3 size holes,which exertive positive effectin precise drilling work. Adjustable: Wooden punch hole rill guider can be fixed to different sized wooden boards. It can be adjustable and can be clamped to plates with thicknesses from 17mm to 60mm. Easy to Use: Straight Hole Locator dowel jig is important to fix the electric drill support first in order to continue drilling.Therefore, there is one 6, 8, and 10mm fixing pin hole on the extension rod, each with 6, 8, 10mm fixing pin, and one each for 1 and 2mm ruled lines. It is very easy-use tool and have a longer using life. Multifunction: This is a practical multifunction and essential tool. With this drill stand, you can use it for DIY woodworking. is very Suitable for furniture factories,woodwork enthusiasts and DIY Household Projects.