This set contains a rotating, non-marring depth stop, an extra HDPE ring, and four 3/8” carbide-tipped countersinks with the following pilot hole sizes: 3/32", 7/64", 1/8", and 9/64". These bits will drill holes for the most common screw pilot sizes. See the chart below for hole size recommendations for common screw sizes.

These premium carbide rotating countersinks are an essential tool for all woodworkers. They feature an adjustable, no-mar revolving depth-stop, allowing precise drilling without scratching or burning surfaces. These countersink let you drill a pilot hole and countersink in one step, ensuring screws seat perfectly during project assembly.

The adjustable depth control allows users to create flush or recessed countersink holes, accommodating screws or plugs. The bit and countersink depth can be adjusted without disassembly, making it quick and easy to fine-tune. Additionally, the integrated chip evacuation slots ensure clean and efficient drilling.

Perfect for use on softwoods, hardwoods, plywood, sheet goods, decking, and solid surface materials.

Features:

• Drills countersink and pilot hole in one operation
• Rotating HDPE depth stop prevents burning, marring, and scratching
• Depth stop and pilot drill are adjustable without disassembling the unit. (comes with Allen key)
• HSS pilot drill bit included
• 3/8” carbide-tipped countersink
• Quick-release hex shank for fast bit changes
• Double-flute pilot drill and countersink for smooth drilling
• Available in multiple pilot sizes (2mm, 5/64" (#4 screw) to 4mm, 5/32" (#12 screw))
• Packaged in a protective tube

Specifications:

• Quick-release hardened steel hex shank body
• 3/8” diameter carbide-tipped two-flute countersink
• Anodized aluminum rotating depth stop with HDPE ring
• HSS pilot drill bit with flats to prevent rotation
• Can drill countersinks up to 1/2” deep

Recommended screw pilot holes sizes:

• #4: Softwoods: 1/16” Hardwoods: 5/64”
• #5: Softwoods: 5/64” Hardwoods: 3/32”
• #6: Softwoods: 3/32” Hardwoods: 7/64”
• #7: Softwoods: 3/32” Hardwoods: 7/64”
• #8: Softwoods: 7/64” Hardwoods: 1/8”
• #9: Softwoods: 1/8” Hardwoods: 9/64”
• #10: Softwoods: 1/8” Hardwoods: 9/64”
• #12: Softwoods: 9/64” Hardwoods: 5/32”
• #14: Softwoods: 5/32” Hardwoods: 11/64”