Feature: 1. ALUMINUM ALLOY MATERIAL: Made of premium 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 Cutter4 x Log Tenon2 x Hex Wrench 1 x 10mm Drill Bushing1 x Brass Stop Block