Features:1. Made of aluminum alloy body and hard steel drill bushing, durable and accurate to use.2. For the fixation and centering while drilling and woodworking.3. The drill guide jig has 6 drill bushings and their diameters are 5mm, 6mm,7mm,8mm,9mm,10mm. It is rather easy to change the bushingthread into the drill guide jig.4. Centerlines ensure accurate alignment when drilling into various surfaces. By holding the drill guide body, easy to get vertical hole drilled5. The hole jig is a great tool set for both furniture factory and woodworking enthusiasts.6. Can drill in the round piece, corner and etc. Specifications:Model Number:E90237Material:Aluminum Alloy 6061Color:Red/BlueDrill Bushing Size:5/6/7/8/9/10mmQuantity:7pcs/setPackage Includes:1*Dowel Jig6*Drill BushingsNote:1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2. Please allow slight manual measurement deviation for the data.