Drill Guide Jig for Vertical Hole Drilling. Drill Guide Bushing: 4/5/6/7/8/9/10/11/12mm. Anodized surface,resistant to corrosion. Made of Aluminum Alloy, strong strength and long durability. This is a drill guide tools for the fixation and centering while drilling and woodworking. Scope of application:woodworking semi-automatic drilling positioning Model Number:4mm-12mm Pocket Hole Doweling Jig Type:Center Drill Bit Model Number:Self Centering Doweling Jig,Vertical Pocket Hole Jig Type 1: Core Drill Bit Type 2: 4-12 Wood Pin Application:Wood Working Tool tools:Woodworking Joints Tools color:Red Material:aluminum alloy size:148mm x 34mm x 35mm Package Contents: 1 x Hole Puncher Locator Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.