1The jig and the locator are made of aluminium alloy, and the surface is anodized, which is durable and not easy to rust. 2The maximum clamping thickness can get to 52MM, suits perfectly for DIY, woodworking drilling, positioning, punching, etc. 3Equipped with 8mm, 10mm and 15mm three drill bits to satisfy your requirements for different drilling aperture sizes. 4The operation is very simple, the clamping force is strong and it is not easy to slide, making your work more efficient. 5The size is small, and the weight is light, so the storage and carrying are very simple, which makes your daily much easier. Item Type: Hole Drill Guide Jig Model: GGW 3 in 1 B Type Punch Material: Aluminium Alloy Drilling Diameter: Approx. 8mm / 0.3in, 10mm / 0.4in, 15mm / 0.6in (the diameter of the three drill bits respectively) Round Dowel Diameter: Approx. 8mm / 0.3in Maximum Clamping Thickness: Approx. 52mm / 2in Function: Furniture wood punch hole opener, punch locator. 1 x Hole Drill Jig 2 x Round Dowel Locator 3 x Drill Bit 1 x GuideRing 3 x Drill Stop 3 x Fixing Screw 3 x Round Dowel 1 x Hex Wrench 1 x Drill Bushing Wrench 5 x Drill Bushing