Feature:1. Great Accuracy: The accurate hinge positioning of the built in indexing plate is easy to use with any drill bit without special tools.2. With Drill Bit: Comes with a 35mm carbon steel drill bit with thick blade, which ensures high efficiency in hole drilling and opening.3. Extensive Uses: Widely applied to the hinge positioning, opening, drilling and installation on door, cabinet, furniture, and so on.4. Safer Clamping: Used to clamp 15-25mm plate, the adjustable press plate and quick fixing clamp enables quick and simple operating.5. Aluminum Alloy: Adopting premium aluminum alloy material, you don't need to worry about hot melting, very sturdy for long term use.Specification:Item Type: Concealed Hinge JigMaterial: Aluminum alloyColor: Red, black. Hole Opener Size: Approx. 35mm or 1.38inDrill Bit: Approx. 2mm or 0.08inClamping Thickness: Approx. 15 - 25mm or 0.59 - 0.98inHinge Offset: Approx. 3mm or 0.12in, 4mm or 0.16in, 5mm or 0.2in, 6mm or 0.24inUsage: Widely used for hinge opening and installation, door hinge drilling and position, hole woodworking auxiliary tool. .Package List:1 x Hinge Boring Drill Guide1 x Drilling Guide Locator1 x 35mm Hole Opener1 x 2mm Drill Bit1 x Set Screw1 x Limit Ring2 x Hex Wrench2 x Wrench1 x Bearing