Note Please ensure the work piece is stable and maintain the drill bit in a vertical position to prevent breakage. Additionally, it is important to wear protective goggles during operation to avoid any potential for injury Various Drill Bit Sizes 13 sets of titanium hex shank drill bit include 1/16, 5/64, 3/32, 7/64, 1/8, 9/64, 5/32, 11/64, 3/16, 13/64, 7/32, 15/64, 1/4 drill bit set Anti-Slip Drill Bits Equipped with precision 135-degree angled tips for faster cutting. The hexagonal shaft ensures easy and secure attachment in power tools, reducing bit wander and slippage, ideal for quick-change chucks Wide Application The Drill bit set for metal sets can be widely used in plastic, wood, stainless steel, Aluminum Alloy like aluminum, iron and other soft metals. Ideal for DIY, home, and general building/engineering using High-Quality Composition Featuring a traditional High-Speed Steel (HSS) structure enhanced with a titanium coating, these drill bits offer superior performance and lasting endurance. Their sharpened cutting edges are meticulously honed, and the staggered teeth design ensures a smooth and chatter-free operation, providing accurate countersinking and clean hole drilling