This drilling kit is the perfect tool for DIY projects and anyone new to pocket-hole job. The simple design gives you the confidence you need to get started, and you’ll have your project finished easily in less time. The 2-hole Drill Guide with workpiece thickness scale lets you make perfectly placed pocket holes in a wide variety of material widths and thicknesses – from 14mm to 40mm. Drill Guide features a hardened-steel core that carries a lifetime guarantee. The rear-mounted clamp design offers incredible rigidity and uncompromising workpiece holding strength. Adjustments are as easy as releasing the locknut and rotating to the correct setting. It features an optimized drilling angle, specifically designed to increase driving efficiency and minimize the overall size of the pocket hole. The result is a compact pocket hole, 9mm in size. The kit base is made from aluminum alloy after excellent oxidation coating, providing anti-rust, strong strength and long durability.