KnKut KK918LH Left Hand Carbide Tipped Hard Steel Drill Bit - 1/8

The KnKut KK918LH is a specialized 1/8-inch left-hand carbide tipped drill bit designed specifically for drilling hardened steel in the range of 48 to 65 Rockwell "C". This American-made drill bit allows you to drill holes in hardened materials without annealing or significantly changing the structure of the workpiece, making it ideal for extracting broken fasteners and working with extremely tough metals.

Key Features:

• Left-hand cutting direction helps prevent further tightening of broken fasteners during extraction
• Carbide tipped construction for drilling hardened steel up to 65 Rockwell "C"
• Made in USA with quality manufacturing standards
• Oversized carbide cutting tip (not recommended for production use)
• Works without annealing or altering material structure

Recommended Applications:

• Extracting broken studs and bolts
• Drilling out broken easy-outs and taps
• Working with spring bolts and die sections
• Drilling hardened brake drums
• Machining exotic and extra-tough metals

Operating Guidelines: For best results, use heavy pressure with low RPM settings and apply cutting oil during operation. Recommended for use in drill presses, though can be used with portable drills. The left-hand rotation is particularly effective for broken fastener extraction, as the counterclockwise rotation may help loosen stuck hardware during the drilling process.