Drill Bits & Accessories

The Irwin 88930 Speedbor Flat Bit 30mm × 160mm is a large-diameter wood-boring spade (flat) bit from Irwin’s Speedbor Blue-Groove line. It is designed for fast, clean drilling in both softwoods and hardwoods, especially when large holes or significant reach are required. With a 30mm cutting diameter and 160mm overall length, this bit is suited for structural, framing, and rough carpentry work where heavier gauge timber or deeper penetration is needed.

Features:
Blue-Groove point and cutting edge for fast chip removal and faster drilling.
Designed to reduce breakout and splintering for cleaner holes.
Reinforced/enlarged shank for improved strength and reduced bending under load.
160mm length allows reach into deeper or recessed areas.
Capable of working with standard drill chucks (assuming correct shank style) for compatibility with many power drills.
Hardened steel construction for durability under demanding use.

Specifications:
Manufacturer: Irwin
Part Number: 88930
SKU: IRW88930
Bit Type: Speedbor / Blue-Groove Spade (Flat) Bit
Diameter: 30mm
Length: 160mm overall
Shank Type: Standard reinforced shank (hex or similar for anti-slip)
Material: Hardened steel
Intended Material: Softwood and hardwood / structural timber

Uses:
Drilling large 30mm holes through thick timber, joists, beams, or studs.
Creating pass-throughs for large conduit, pipes, or wiring through wooden structures.
Carpentry and construction work where large, clean holes are needed.
Framing, rough carpentry, and structural work requiring reach into difficult or recessed spaces.
Tasks where hole exit and edge quality matter, minimizing splintering or tear-out.