Features Great Accuracy: The accurate hinge positioning of the built in indexing plate is easy to use with any drill bit without special tools. With Drill Bit: Comes with a 35mm carbon steel drill bit with thick blade, which ensures high efficiency in hole drilling and opening. Extensive Uses: Widely applied to the hinge positioning, opening, drilling and installation on door, cabinet, furniture, and so on. Safer Clamping: Used to clamp 15-25mm plate, the adjustable press plate and quick fixing clamp enables quick and simple operation. Aluminum Alloy: Adopting premium aluminum alloy material, you don't need to worry about hot melting, very durable for long term use. Specification: Item Type: Concealed Hinge Jig Material: Aluminum alloy Color: Red, black. Hole Opener Size: Approx. 35mm / 1.38in Drill Bit: Approx. 2mm / 0.08in Clamping Thickness: Approx. 15 ~ 25mm / 0.59 ~ 0.98in Hinge Offset: Approx. 3mm / 0.12in, 4mm / 0.16in, 5mm / 0.2in, 6mm / 0.24in Usage: 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 Package List 1 x Hinge Boring Drill Guide 1 x Drilling Guide Locator 1 x 35mm Hole Opener 1 x 2mm Drill Bit 1 x Set Screw 1 x Limit Ring 2 x Hex Wrench 2 x Wrench 1 x Bearing