Drill Bit, Size (In.) 1/4, Decimal Size (In.) 0.2500, Drilling Depth (In.) 3-3/4, Overall Length (In.) 4, Steel, Titanium Finish, Features 135 Degrees Degree Split Point- Precision Start No Walking, Thunderbolt(r) Web-Provides Longer Life and Faster Drilling Times, Parabollic Flute- Clears Chips Faster, Titanium Coating- Keeps The Bit Sharp