Features: Hand Drill Tools comes with 3 different sizes (6/8/10mm) Drill Bushings in the package, so that to easily drill holes of different sizes and meet various holing needs. This Vertical Self Centering Pocket Hole Jig Made from Aluminum Alloy, strong strength and long durability. It is wear-resistant, rustproof, solid, and excellent for use. Centerlines ensure accurate alignment when drilling into various surfaces.By holding the drill guide body, easy to get vertical hole drilled without any deviation. You can clean quickly, grooves designs for discharge dust. It can be cleaned and put into a cupboard. It does not occupy a lot of space and can be kept well. This is a set of drill guide tools for the fixation and centering while drilling and woodworking, great for fixing on all kinds of on board of different thickness. Specifications: Material:Alloy Quantity:4Pcs/Set,11Pcs/Set Drill Diameter:6/8/10mm (0.2''/0.3''/0.4'') Packing Size:Approx.60mm/2.36''x60mm/2.36''x50mm/1.97'' Package Includes: 1Set Self Centering Doweling Jig note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.