23/31" economy s & d drill bits. silver & deming style drill bits have a 135 degree point. surface treated to ward off heat and friction commonly found in heavy duty drilling jobs. high speed black oxide finish, 2 tone. used to cut wood, soft and hard metals. 1/2" reduced shank.

• Designed for drilling wood soft metal and hard metal
• Surface treated to ward off heat and friction commonly found in heavy duty drilling jobs
• Reduced 1/2-Inch shank fits all 1/2-Inch or larger chucks
• Silver and Deming style drill bits with 135 degree split point