The IRWIN 88814 is a 7/8-inch spade-style wood drill bit designed for fast, aggressive boring through wood framing, decking, and rough carpentry. The chamfered cutting edge improves durability during sustained cutting, while the optimized point tip — wider and longer than previous-generation designs — reduces splintering at entry and exit. The patented Blue-Groove cutting edge clears chips quickly, maintaining speed throughout the bore. At 6 inches in working length, this bit reaches through standard stud walls and dimensional lumber with a standard drill or right-angle drill. Carpenters, electricians, and plumbers routinely use spade bits like this for running cable or pipe through framing.
This bit is suited for residential and light commercial rough-in work where fast wood removal matters more than finished-hole quality. Typical applications include boring through wall studs, floor joists, and blocking for conduit, pipe, or cable runs. The 7/8-inch diameter is a common size for 1/2-inch conduit rough-in clearance and similar trade applications. It is packaged individually and is compatible with any standard 3/8-inch or 1/2-inch keyed or keyless chuck drill driver.
Key Features
Chamfered cutting edge for improved durability in repeated wood cutting
Optimized wide-and-long point tip minimizes splintering and helps control feed rate
Patented Blue-Groove cutting edge for aggressive chip removal and fast drilling
7/8-inch diameter x 6-inch length suits deep rough-in boring through framing
Fits standard 3/8-inch and 1/2-inch drill chucks
Compatibility
Designed as an OEM-style replacement-grade spade bit for use in any standard 3/8-inch or 1/2-inch keyed or keyless drill chuck.
Installation Notes
Spade bits are installed and removed by licensed electricians, plumbers, and carpenters working to NEC, IPC, or IFGC rough-in requirements as applicable. Before boring, confirm no utilities are present in the drilling path. Use a variable-speed drill and allow the point tip to center fully before applying feed pressure to reduce splintering. Withdraw the bit periodically on deep cuts to clear chips and prevent binding.
