Tool-less Countersink Drill Bit with Repeatable Depth Adjustment and Replaceable Carbide Cutters

This countersink drill bit lets you set screw recess depths without reaching for a specialty wrench. Release the magnetic lock ring, twist to adjust, and release it to lock the setting. Side indices help you return to a previous depth when drilling repeated holes for woodworking projects.

The KM Tools countersink comes fitted with a 3/8-inch countersink and 3 mm HSS drill bit. Its freely spinning anodized aluminum depth stop runs on sealed, greased ball bearings, while wide chip ejection openings help you see the drilling area and clear chips. Replace the carbide cutters or drill bit individually when needed.

Features

• Tool-less magnetic lock ring for convenient depth changes.
• Ten indexable stops per rotation for adjustments as small as 0.1 mm.
• Side indices help reproduce depth settings across repeated holes.
• Freely spinning depth stop supported by sealed and greased ball bearings.
• Replaceable carbide cutters and HSS drill bit.
• Wide chip ejection openings improve visibility and chip clearance.

Specifications

• Stock configuration: 3/8-inch countersink with 3 mm drill bit
• Countersink angle: 82 degrees for the included 3/8-inch bit
• Maximum counterbore depth: 0.375 inch / 9.5 mm
• Depth adjustment: 10 indexable stops per rotation; adjustments as small as 0.1 mm
• Depth stop material: Anodized aluminum
• Depth stop bearings: 6701-zz sealed and greased ball bearings
• Drill bit material: HSS
• Countersink cutters: Carbide
• Screw size range: #6 to #10 screws with the included 3/8-inch countersink
• Tool requirement: Use in a drill; not an impact driver
• Replacement thread: 1/4-28; maximum replacement counterbore width of 1/2 inch
• Separately available replacement sizes: 1/4-inch countersink with 2 mm drill bit; 1/2-inch countersink with 3.5 mm drill bit

Frequently Asked Questions

What size countersink and drill bit are included?

The tool-less countersink comes fitted with a 3/8-inch countersink and a 3 mm HSS drill bit. The included countersink has an 82-degree angle and is intended for #6 to #10 screws.

How do I adjust and repeat the drilling depth?

Release the countersink's magnetic lock ring, twist to change the depth, and release the ring to lock it. Ten indexable stops per rotation allow adjustments as small as 0.1 mm, and the side indices help you return to a previous setting.

Can I use this countersink in an impact driver?

Use this countersink in a drill rather than an impact driver. The hammering action of an impact can damage its brittle carbide cutters.

Can the cutters and drill bit be replaced separately?

Yes, the countersink's carbide cutters and drill bit can be replaced individually or together. The body accepts replacement countersinks with a 1/4-28 thread and a maximum width of 1/2 inch; alternative sizes are sold separately.

Which materials can I drill with this countersink?

This countersink is suitable for natural wood, plywood, chipboard, manufactured boards, MDF, acrylic and composite decking materials. Aluminum and other non-ferrous metals require coolant.