The 137-degree, self-centering split point on Spyder’s STINGER Mach-Blue drill bits won’t walk or wander, even when starting a hole on curved or on pre-hardened surfaces – like this super-tough grade 8 cap screw. The heat-treated high-speed steel construction is ideal for hand-drilling — tough, durable, yet not brittle like cobalt bits. Mach-Blue will be available exclusively at Lowe's and Lowes.com this March! | Spyder