Premium High Speed Steel Twin End 135-Degree Split Point. 135-Degree split point for accurate centering and fast penetration. Precision ground point, flutes, body, clearance and drill diameter for ultimate accuracy and performance. Special Hi-Molybdenum tool steel. Twin End - Heavy Duty.
When I tried this product, the build quality was subpar .The bits kept breaking easily, causing frustration and delays in my work. The packaging also left a lot to be desired with the bits not securely HELD in place. Overall, I would not recommend this product..
Short bits are very handy for drilling rivets and spot welds on cars. The short length allows you to get into places that are inaccessible to a conventional drill. They also seem to stay sharp longer than other brands I've tried before.