Features:1. Aluminum alloy body and hard steel drill sleeve, durable and accurate to use.2. For fixing and centering during drilling and woodworking.3. The jig guide drill has 6 drill sleeves, and their diameters are 5mm, 6mm,7mm,8mm,9mm,10mm. It is quite easy to change the bushing of the thread into a jig guide drill.4. The centerlines provide accurate alignment when drilling on a variety of surfaces. Holding the guide drill, it is easy to get a vertical hole5. The jigsaw is a great tool kit for both the furniture factory and woodworking enthusiasts.6. It can drill in round piece, corner, etc. Specifications:Model Number: E90237Material: 6061 Aluminum Alloy Color: Red/BlueDrill Sleeve Size: 5/6/7/8/9/10mm Quantity: 7pcs/setPackage Included:1*Dowel Jig6*Drill SleevesNote:1. The actual colors 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.