Robert Bosch Tool Group NKST18 Auger Bit 1-1/8 X 7-1/2 Inch

Product Description

The ROBERT BOSCH TOOL GROUP NKST18 is a 1-1/8 inch by 7-1/2 inch auger bit engineered for wood boring in environments where embedded nails are a routine hazard. The bit features dual cutting edges that split drilling load for balanced performance and cleaner cuts, along with a reinforced tip designed to survive repeated contact with nails without premature failure. An open-faced flute design promotes faster chip evacuation, keeping the bore clear and reducing heat buildup during extended use. A reamer edge improves both entry and exit hole quality, which matters when finish appearance or tight tolerances are required. Carpenters, electricians, and plumbers boring through framed lumber reach for this bit when nail strikes are likely.

The NKST18 is suited for residential and light commercial rough-in work where drilling through framed walls, floors, and plates is common. Electricians running conduit or wire, plumbers routing pipe, and carpenters cutting through existing framing will find this bit appropriate when older lumber with hidden fasteners is involved. The 7-1/2 inch length provides adequate reach for standard stud and plate boring without requiring an extension in most single-wall applications. The Daredevil Nail Killer designation reflects its rated 9x service life compared to standard auger bits when nail hits occur during use.

Key Features

• Dual cutting edges deliver balanced drilling load and easier nail cutting
• Reinforced tip withstands repeated nail strikes without tip failure
• Open-faced flute design improves chip removal and reduces clogging
• Reamer edge improves entry and exit hole quality for cleaner bores
• Rated 9x service life with nail hits versus standard auger bits
• 1-1/8 inch diameter by 7-1/2 inch length suits standard framing applications

Compatibility

Designed as an OEM-style auger bit for use with standard hex-shank or auger-chuck corded and cordless drills rated for large-diameter wood boring.

Installation Notes

Installation of this bit is performed by electricians, plumbers, and carpenters during rough-in framing operations. Ensure the drill chuck is fully tightened and the bit is seated squarely before beginning a bore. Eye protection is required when boring through lumber that may contain nails or other embedded fasteners. Follow applicable NEC, IPC, or IFGC clearance requirements when boring holes for wire, pipe, or conduit through structural framing members.