Industrial quality cobalt drill bits are designed for drilling in hard abrasive materials such as stainless steel and titanium. The 135 deg. split point penetrates immediately and prevents walking. Size: 1/4 In. Material: Cobalt Length: 4 In. Shank Diameter: 1/4 In. Drilling Depth: 2-3/4 In. Tip Angle: 135 Degree