Have You Calculated How Long It Takes to Adjust a Regular Countersink?

The traditional method: find a hex wrench, loosen the screw, turn the adjustment ring, read the mark, tighten the screw, and put the wrench away.

Fast users take about 30 seconds. Slow users take nearly a minute.

Installing one screw only takes a few seconds, yet adjusting the depth often takes longer than the actual job.

This Automatic Feed Countersink Bit eliminates the need for tools. Simply press the lock button, rotate the ring, and release the button-done in about three seconds.

How Does It Work?

There is a lock button on the side. Press it in the direction of the arrow to release the adjustment ring. Turn it to the desired mark, then release the button to lock it in place. The structure is simple but very effective.

Forward and Reverse Both Work

Here is another advantage. Most screw guns have forward and reverse functions. When set to reverse, you can still adjust the ring and change the depth without disassembly. No need to take anything apart.

High-Quality Materials Inside

The stop ring is made of aluminum alloy. The main body is made of chrome vanadium steel. The cutting blade is made of 6542 steel, and carbide options are also available.

There is a built-in bearing. When the bit contacts the wood surface, it stops rotating, preventing scratches.

All markings are laser-engraved and will not fade with heavy use.

Our Production Process

After receiving an order, we first confirm production capacity and set a clear delivery schedule. Production is then arranged step by step to ensure on-time delivery. For urgent orders, we communicate lead times in advance.

We support OEM customization. Packaging and export packaging can both be customized according to customer requirements.

Models and How to Use

Standard models range from 2.8×8mm up to 4.8×12.7mm. Adjustable length is 12–35mm. Center drill length is 60mm.

The 2.0×8mm and 2.4×8mm models are available as custom orders.

Three Steps to Use

1. Press the lock button

2. Rotate the adjustment ring

3. Release the button

That's it.

Product Parameters

Model	Countersink Dia.	Center Drill Length	Center Drill Dia.	Adjustable Length	Note
2.0×8mm	8mm	60mm	2.0mm	12–35mm	Custom order
2.4×8mm	8mm	60mm	2.4mm	12–35mm	Custom order
2.8×8mm	8mm	60mm	2.8mm	12–35mm	Standard model
2.8×10mm	10mm	60mm	2.8mm	12–35mm	Standard model
3.2×8mm	8mm	60mm	3.2mm	12–35mm	Standard model
3.2×10mm	10mm	60mm	3.2mm	12–35mm	Standard model
3.5×8mm	8mm	60mm	3.5mm	12–35mm	Standard model
3.5×10mm	10mm	60mm	3.5mm	12–35mm	Standard model
4.0×8mm	8mm	60mm	4.0mm	12–35mm	Standard model
4.0×10mm	10mm	60mm	4.0mm	12–35mm	Standard model
4.4×12.7mm	12.7mm	60mm	4.4mm	12–35mm	Standard model
4.8×12.7mm	12.7mm	60mm	4.8mm	12–35mm	Standard model