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Features:
18" long, 9/16" diameter, .370" shank
Hole in flute (head) makes it easy to pull wires through hole in wall
Boring action is faster, smoother, cleaner in most every material encountered in wiring installations
Longer flute section for deeper boring
Special flute finishing process assures quick chip removal, no clogging, no binding
An old standard that keeps on working. An essential !!June 18, 2004 3 out of 3 found this review helpful
I've been using these for years in the satellite tv, alarm, and the electrical industry. The 18" length is just ideal for drilling from outer walls into the interior, through top and bottom wall plate studs into walls. These are fast drilling and long lasting. I have them in 1/4, 5/16, 3/8 and 1/2" diameters. The 5/8's will be ideal for standard sheathed cable.
