13pcs cobalt hex drill bits set, includes 15, 20, 25, 30, 32, 35, 40, 45, 48, 50, 55, 60, 65mm with 1/4 inch hex shank. Special plug hex design provides improved performance compared to standard pressed hex, helping prevent bit slippage and ensuring secure connection during impact drilling. Cobalt-containing drill bits offer longer life than titanium-coated bits. Fully ground spiral flute allows for quick chip removal, reduces friction and heat, delivering faster, cooler and more efficient drilling. 135-degree split point tip prevents walking and ensures accurate, stable drilling. No center punch required. 1/4 inch hex shank fits most drills and drill presses, enabling quick, easy and secure installation without slipping or detachment. Suitable for use on wood, plastic, steel plate (up to 5mm), aluminum alloy and other soft metals. Ideal for DIY projects, home maintenance and repair tasks. Not intended for use on glass, ceramic or concrete. Color: Silver Material: High-speed steel Package Contents: 13 x Cobalt Hex Drill Bits Note: Light and display settings may cause slight color variation between the image and actual item. Measurement may vary by +/- 1-3 cm.