Cobalt Steel Drill Bit, 5/16-In. Lawn & Garden Collection double-tempered finish reduces breakageHot isostatically

double-tempered finish reduces breakageHot isostatically pressed to extend life and resist breakageCopper braze material gives high heat resistance for reduced tip lossAll tips made to ANSI specifications

Fits Most Straight and Curved Shaft String Trimmers

Rated up to 125 psi at 210 F

squeaks and vibrations

Cobalt Steel Drill Bit, 5/16-In. Lawn & Garden Collection double-tempered finish reduces breakageHot isostatically135 degree split point to minimize walk. Cobalt for higher heat & abrasion resistance. Heavy duty web construction for strength & durability. For tough metal drilling, including heavy duty abrasive, alloy metal drilling on hardened steel.