8 pieces 9/16" to 1" by 1/16", Jobber length. 135@ split point, 1/2" cut down shank so you can use them in any 1/2" chuck in hand drills or drill press. Titanium coated HSS for hard materials. These drills are great for drilling sizes over 1/2" sizes. For Real Hard materials we recommend the
M42 COBALT Set