1、Constructed of industrial grade aluminum alloy, it is of good strength, high corrosion resistance and long durability. 2、The drill bushings adopt die steel with heat treatment, sturdy and accurate for positioning. 3、Large clamping range from 17mm to 60mm. 4、Equipped with precision positioning scale, determining the distance between the first hole and the clamp. 5、Comes with 9 drill bushings in 3 sizes, meeting different needs of wood drilling. This is a professional locator and hole drilling tool for woodworking and furniture manufacture. It is mini in size, easy to use, helping you drill hole quickly and easily.   Features: 1. Constructed of industrial grade aluminum alloy, it is of good strength, high corrosion resistance and long durability. 2. The drill bushings adopt die steel with heat treatment, sturdy and accurate for positioning. 3. Large clamping range from 17mm to 60mm. 4. Equipped with precision positioning scale, determining the distance between the first hole and the clamp. 5. Comes with 9 drill bushings in 3 sizes, meeting different needs of wood drilling.   Specification: Tool body material: Aluminum alloy 6061 Drill bushings material: die steel Drill bushings size: 6/8/10mm (3pcs/size) Positioning dowel size: 6/8/10mm (1pc/size) Clamping Range: 17~50mm wood board Color: Blue Item Size: 23.5*10* 3.5cm / 9.25* 3.94* 1.38in Weight: Approx. 861g / 30.4oz   Usage: 1. Adjust the positioning scale to determine the distance between the first hole and the board end. 2. After fixing the position, select the drill bit that matches with the drill bushings to start drilling. 3. Remove the nuts on the scale after holing three holes 4. Use the positioning pin to fix the hole on the third hole (make sure the distance of each hole is the same). 5. Drill all straight holes 6. Stick the round wood pin with glue firmly to the punched hole   Packing list: 1 * Doweling Jig 9 * Drill Bushings 3 * Positioning Dowel   Note: 1. Due to the difference between monitors and light effect, the pictures may not reflect  the actual color of the item. 2. Please allow slight error due to manual measurement. Thanks for your understanding.