MULTIPLE SIZE:Hand Drill Tools comes with 8 different sizes (3/4/5/6/7/8/9/10mm) Drill Bushings in the package, so that to easily drill holes of different sizes and meet holing needs.The two claws are convenient for quickly setting the center of the hole, and the maximum thickness of the hole is 65mm STRONG&: This Vertical Self Centering Pocket Hole Jig Made of Aluminum Alloy, strong strength and long durability. It is wear-resistant, rustproof, solid, and excellent for use. ACCURATE DRILLING: Centerlines accurate alignment when drilling into surfaces.By holding the drill guide body, easy to get vertical hole drilled without any deviation EASY TO CLEAN: You can clean quickly, groove design for discharge dust. It can be cleaned and put into a cupboard. It does not occupy a lot of space and can be well WIDE APPLICATION: 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