Drill Bits & Accessories

The Irwin 88916 Speedbor Flat Bit 16mm × 155mm is a high-performance wood boring bit designed to drill larger diameter holes in timber and wood products. With a 155mm total length and a 16mm cutting diameter, it’s ideal for tasks that require deeper reach combined with larger holes, such as running bigger cables, plumbing, or creating openings in studs, beams, or door frames. Its Blue Groove point and double spur cutting spurs help reduce splintering and improve cutting speed. It is suited for both professional tradespeople and serious DIY users who need clean holes, durability, and consistent performance.

Features:
Blue Groove point and cutting edges for faster chip removal and reduced burning.
Double cutting spurs that scribe the outer edge to minimize breakout and splintering.
Reinforced, larger shank to improve durability and resist bending under load.
Length of 155mm provides reach for deeper drilling in thick timber.
Compatible with standard drill chucks and quick-change hex adapters.
Hardened steel construction for toughness and long bit life.

Specifications:
Manufacturer: Irwin
Part Number: 88916
SKU: IRW88916
Bit Type: Spade Bit (Speedbor Blue Groove)
Diameter: 16mm
Length: 155mm
Shank Type: Hex shank, reinforced
Material: Hardened steel

Uses:
Drilling 16mm holes in studs, beams, joists, and other structural timber.
Creating pathways for larger diameter conduit, pipes, or cables through wood.
Carpentry and construction tasks where large clean holes are required.
DIY and trade woodworking, furniture making, decks, and heavy carpentry work.
Situations where reduced splintering and clean hole exit are important.