Drill bit AWTools AW40321, model AW40321, weight 38 g

AWTools AW40321 drill bit is a compact, single-piece HSS bit with a blackened finish, designed for combined pilot hole and countersink operations. Weighing 38 g, it is intended as a replacement or spare accessory for drills equipped with 1/4" quick-change chucks and for users who need a lightweight tool for routine maintenance, repair, or light construction tasks.

Advantages

The bit is made of high-speed steel (HSS) with a blackened surface treatment for enhanced wear resistance and reduced glare. Its geometry enables drilling a pilot hole and creating a countersink in one continuous action, which shortens operation time and improves alignment for subsequent screw driving. A small hex wrench is included to adjust countersink depth, allowing controlled recessing of screw heads. Compact dimensions and compatibility with universal 1/4" quick-change chucks make it easy to store, change and carry.

Suitable for

• Assembling flat-pack furniture and cabinet installations
• Drilling pilot holes and countersinks in softwood and hardwood
• Work with chipboard and MDF panels
• Light renovation, repair and assembly-line fastening tasks

Key specifications

• Material: high-speed steel (HSS), blackened surface
• Function: combined pilot hole and countersink drilling
• Chuck compatibility: 1/4" quick-change hex shank
• Included accessory: hex wrench for countersink depth adjustment
• Intended materials: soft and hard wood, chipboard, MDF
• Weight: 38 g

How to use

Insert the hex-shank end into a compatible 1/4" quick-change chuck and secure it according to the drill manufacturer’s instructions. Use the included hex wrench to set the desired countersink depth before starting. Position the tip at the marked drilling point, apply steady axial pressure and start the drill at an appropriate speed for the workpiece material. Drill until both the pilot hole and countersink are formed, then stop and remove the bit. Adjust countersink depth as needed for the screw head profile and material thickness.

Usage recommendations

Use moderate drill speed and consistent pressure when working in hard wood or dense chipboard to avoid overheating. For cleaner edges on thin panels, support the workpiece from underneath and back the exit side with a sacrificial board. Regularly inspect the cutting edges and replace the bit if wear reduces drilling accuracy.