Features： 1、ALUMINUM ALLOY MATERIAL: Made of aluminum alloy material, the drilling locator puncher is strong and sturdy, lightweight and corrosion resistant, ensures a long life span. 2、3 DRILL BITS: There are 3 drill bits in the package of different size, 8mm, 10mm, 15mm. You can use them respectively according to your actual needs. 3、CLAMPING RANGE: This doweling jig drill kit has a clamping range up to 40mm. Check the range for better using experience! 4、DRILLING ADJUSTABLE: The adjustable metal bushing is accurately aligned when drilling, and it is easy to adjust the drilling height and drilling depth. 5、IDEAL REPLACEMENT: This dowel drill guide kit is an ideal hole puncher tool replacement for more accurate and efficient hole punching! Specification： Item Type: Doweling Jig Drill Kit Material: Aluminum Alloy Maximum Clamping Range: Approx. 40mm / 1.57in Round Wood Tenon Material: Basswood Package List： 1 x Drill Bushing  1 x Pre Embedded Accessory  1 x Fixing Clip  3 x Drill Bit  1 x Milling Cutter 4 x Log Tenon 2 x Hex Wrench  1 x 10mm Drill Bushing 1 x Brass Stop Block