This vertical self-centering pocket hole jig is made of 6061 aluminum alloy, strong and durable. It is wear-resistant, rust-proof, solid and excellent to use. Center pins ensure precise alignment when drilling into various surfaces. Holding the drill sleeve body makes it easier to drill a vertical hole without any deviation. The drill guide jig comes with 5 different sizes (6/7/8/9/10mm) of drill guides in the package, so that to easily drill holes of different sizes and meet various needs of drilling. This is a set of drill guide tools for fixing and centering when drilling and woodworking. In order to ensure that the log pin hole is perpendicular to the joint surface, the log pin hole positioner should be used when making wooden furniture. spanking connected by newspaper pin. Item Type: Right Angle Ruler Material: Aluminum Alloy Product Size: 55 x 80mm Package List: 1 x Single Hole Punch