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High Speed Steel Drill Bits

High Speed Steel Drill Bits

Aircraft Extension HSS Drill Bits

Aircraft Extension HSS Drill Bits

Aircraft Extension drill bits are similar in length to extra length bits, emphasizing reach over cutting depth, and have a shorter flute length (about the same as a jobber drill). This makes the bit much stronger and less susceptible to bending and breaking.
Sorting Qty Item # Brand Model # Cut Diameter Length of Cut Overall Length Point Angle Finish/Coating Price Qty
12 20007668 Republic Drill Corp. 912 21 #21 2 1/8" 12" 135° Black Oxide
13 20007611 AFISCO Pro #21 2 1/8" 12" 135° Black Oxide
14 20006070 Republic Drill Corp. 906 21 #21 2 1/8" 6" 135° Black Oxide
15 02068110 Morse Cutting Tools 16750 #21 2 1/8" 12" 135° Black Oxide
16 02066090 Morse Cutting Tools 16634 #21 2 1/8" 6" 135° Black Oxide