Adjustable depth stopper: a drill countersink with a depth stopper to prevent penetration. This feature improves work efficiency by allowing you to set the countersink length to match different screw lengths. Chip evacuation: the countersunk wood spiral flutes quickly evacuate chips from the hole, helping to prevent dirt and debris buildup in the work area. Multipurpose: suitable for home or professional woodworking projects. Effective for drilling countersink holes in soft materials such as wood, aluminum, plywood, plastic, and PVC boards. Not recommended for metal or sheet steel. Material: made of quality alloy for the predrill with countersunk head, offering cutting performance, durability, and good wear resistance. Typical uses: Assembling furniture or cabinetry in softwood or plywood, ensuring flush screw heads. Installing decorative trim or door frames with consistent countersink depth. Light fabrication or hobby projects involving aluminum or plastic panels requiring flushmounted screws.