Features: 1. Effortlessly drill precise holes The Self-Centering Drill Bits make precise drilling quick and easy Save your time and energy by effortlessly creating perfectly centered holes. 2. Drill accurate, well-centered holes every time with the Self-Centering Drill Bits Work smarter and increase your productivity with precise and accurate drilling 3. Create perfectly centered holes: The Self-Centering Drill Bit is built with a spring-loaded guide that centers the bit. The spring-loaded guide within the bit creates precise positioning-every time. 4. 7 bits included, versatile sizing: The Self-Centering Drill Bits come in 7 different sizes, ensuring you'll always have the right sized bit for any job. With perfectly aligned positioning, you'll create a clean and professional product. 5. Accurate, reliable and built to last: Crafted from carbon steel and aircraft-grade aluminum, the drill bits are durable, strong and built to withstand extended use. The bit are perfect for door hinge installation, cabinet installation, drawers and more. Notice: 1. Actual color may be slightly different from the image due to different monitor and light effect. Please allow slight deviation due to manual measurement. Specification: Material: Brass+HSS Handle diameter: 1/4inch(6.35mm) Handle type: hexangular handle color: silver tone Hole diameter 5/64 (Hole diameter is about 2 mm, Use about 2.2~2.8 mm tapping screw) 7/64 (Hole diameter is about 2.8 mm, Use about 3~3.5 mm tapping screw) 9/64 (Hole diameter is about 3.5mm, Use about 4~4.5 mm tapping screw) 11/64(Hole diameter is about 4.5mm, Use about 5~5.5 mm tapping screw) 13/64(Hole diameter is about 5.1mm, Use about 5.6~6.1 mm tapping screw) 1/4 (Hole diameter is about 6.3mm, Use about 6.8~7.3 mm tapping screw) 5mm (Hole diameter is about 5mm, Use about 5.5~6 mm tapping screw) 7PCS include 5/64 7/64 9/64 11/64 5mm 13/64 1/4 includes: 1 set(7PCS) x Self-Centering Drill Bits