Adjustable Precise Hole Cutting : Quickly and easily adjust your drill's depth to achieve precise measurements every time. Perfect for those meticulous tasks requiring accuracy. Durable Alloy Steel : Constructed from high-quality alloy steel, this collar set is built to last, ensuring durability and reliability in all your drilling projects. Setscrew Type Collar : Designed with a setscrew mechanism for a secure hold on your drill bit, preventing it from slipping while maintaining the desired depth. Black Oxide Carbon Steel : Coated in black oxide for enhanced resistance against corrosion, these depth stops ensure longevity even in demanding conditions. Prevent Excessive Penetration : Safeguard your workpiece and drill bits by setting the exact drilling depth, preventing over-penetration and potential damage. Elevate your woodworking game with our precision drilling collar set, the ultimate solution for achieving accurate depth every time. Say goodbye to guesswork and hello to flawless results!