Irwin IRWIW3035110 Pilot Countersink Bit No 10 | IW3035110

Irwin IW3035110 Pilot Countersink Bit No. 10 (1/4" Hex Shank)

Irwin IW3035110 pilot countersink bit is a drilling accessory designed to drill a pilot hole and form a countersink in one pass, helping No. 10 screws sit flush for a tidy finish in woodwork.

Ideal for joinery, cabinetry and general DIY, the IW3035110 combines a pilot drill and countersink to speed up repetitive screw fixing while keeping results neat and consistent.

Key Features

• Pilot & countersink in one: Drills the pilot hole while creating the countersink for quicker, cleaner screw fixing.
• For No. 10 screws: Matched sizing helps achieve a flush finish for common No. 10 wood screws.
• 90° countersink angle: Suitable for most countersunk screw heads used in woodworking.
• HSS construction: High-speed steel design offers durability and wear resistance for regular workshop use.
• 1/4" hex shank: Quick, secure fitment in compatible chucks and 1/4" hex quick-change holders.

Specifications at a glance

Suitable applications

• Woodworking tasks where a flush screw head finish is required (e.g. cabinets, trim, general joinery).
• Pre-drilling and countersinking for No. 10 screws to help reduce splitting and improve finish quality.
• Fast, repeatable screw fixing using drill/drivers with a compatible 1/4" hex fitting.