Feature: 1. VERSATILE PRODUCT INCLUSION: The set includes 8 different sizes of self centering hinge drill bits: 5/64in, 7/64in, 9/64in, 11/64in, 13/64in, 5mm, and 1/4in, along with a hex wrench and 8 replacement drill bits. Adjust drilling depth to meet all your needs. 2. EXCEPTIONAL DESIGN: The self centering drill bit set features automatic centering functionality for improved precise. With a dual hole design, sawdust is quickly ejected from both sides of the hole, preventing clogging and ensuring smoothly drilling operating. 3. WIDE APPLICATION: Ideal for use in furniture, kitchen cabinets and doors, these drill bits are suitable for various wood hardness levels. Easily replace the drill bits by unscrewing the screw with the hex wrench and swapping in the appropriate bit. 4. PRECISE TOOLS: The adjustable design allows for easy drill bit replacement. The automatic centering feature enhances precise and efficiency in positioning. Sawdust is automatically discharged from the holes on either side of the drill bit top, preventing clogging and maintaining optimal performance. 5. EXCELLENT QUALITY: The 16 piece self centering drill bit set is crafted from high speed steel with a hardened and rot resistant shell, providing high hardness, durability, and excellent drilling performance. Specification: Item Type: Self Centering Drill Bit Set Material: High Speed Steel Weight: Approx. 380.00g / 13.4oz Diameter: Approx. 6mm / 0.24in Length: Approx. 5/64in: 86mm / 3.39in 7/64in: 88mm / 3.46in 9/64in: 96mm / 3.78in 9/64in: 96mm / 3.78in 11/64in: 98mm / 3.86in 13/64in: 108mm / 4.25in 5mm: 109mm / 4.29in 1/4in: 112mm / 4.41in. Package List: 1 x Set of Self Centering Drill Bit Set (17 pieces)