Irwin 1/4 x 4-1/2 In. Solid Ctr Auger
Design provides extra rigidity while boring, wide lands keep bit straight as it bores. Flutes are ground behind the lands to funnel chips to bit inside for cleaner/faster cut. Single spur cutting edges scribes hole, bits have 4-1/2 In. twist & 7-1/2 In. overall length. Full length heated treated bit.
Design provides extra rigidity while boring
Wide lands keep bit straight as it bores
Flutes are ground behind the lands to funnel-
Chips to bit inside for cleaner/faster cut
Single spur cutting edges scribes hole
Bits have 4-1/2 In. twist & 7-1/2 In. overall length
Full length heated treated bit