http://is.gd/Q4S5Xh

L.H. Dottie RTTP6020 Step Drill Bit, 1/4-Inch to 1-1/8-Inch Base and Tip

A real money saver base bits last 3 to 4 times longer at a fraction of the cost

Economical replaceable tips lock in place

Step bit performance remains identical to that of non replaceable tip bits

Constructed of M2 high speed steel, coated with titanium and cobalt

Tri-cut tip cuts smoother, faster and cooler