HARFINGTON 7pcs Self Centering Drill Bit Set 5/64-1/4" 5mm, 1/4" Hex Shank Drilling Bits for Wood Working, Cabinet Door Hinge Hole Punch Tool Self Center with Hex Keys L-Shaped, Silver - hta240531hh001121

• Size - The self-centering drill bit features a centering bit of 5mm,7/64",13/64",5/64",9/64",11/64",1/4" diameter, a centering bit length of 85mm/82mm/61mm/84mm/70mm/74mm/47mm, a 1/4" (6.35mm) hex shank, and measures 108mm/111mm/108mm/91mm/90mm/98mm/98mm in total length. Material - Constructed from carbon steel, the self-centering drill bit for hinges has high hardness ensuring durability and longevity, also resists wear and deformation under high torque, making this drill centering tool easier and faster to create clean holes. Features - The self-centering design ensures precisely holes locating, also ensures stability, reducing slippage risks —crucial for repetitive drilling tasks. Centering drill bits enhance efficiency by quickly clearing sawdust through dual-exhaust ports, preventing clogs. The self centering punch set includes a hex key for effortless setup and adjustments, so change bits without re-chucking. Applications - The self centering drill bit for wood is mainly used for creating precise holes and starting points for constant drilling or tapping operations like door hinge, cabinet, door butt, handles, drawer slides installation. It is a good helper for woodworkers, DIY enthusiasts, carpenters, metalworkers, and anyone needing precision drilling. Note - Before initial use, ensure the centering drill bit is securely tightened. When drilling, maintain a low speed between 2000 and 3000 revolutions per minute (r/min) to prevent bit deflection, breakage, or jamming.