Reaper Cobalt Drill Bits are constructed of a patented 8% cobalt and high-molybdenum alloy, which increases the drill bit strength, and allows for greater heat resistance when drilling the hardest and most demanding materials. Reaper Cobalt Drill bits feature a 135-degree split point eliminating the need for pilot hole predrilling, or starter punching. Reaper Cobalt Silver & Deming Drill bits are available in sizes from 9/16” up to 1-1/2”, and 24mm – 35mm.