Single Twist type with single spur, cutter and side lip. Hollow center twist design for fast, continuous flow of chips. Medium-fast screw pitch. Can be used for boring creosoted poles and construction timbers and multiple timber applications. Heat-treated full length. Guaranteed consistent Rockwell hardness. Bores smooth clean holes for installing bolts and pins. 7/16″ Hex shank fits all adjustable 1/2″, 3-jaw chucks and bit extensions. 5″ shank has 1 3/4″ of 1/2″ round and 1 3/4″ of 7/16″ hex. Cut off hex section and use 1/2″ round shank if job requires. 29″ Overall length, 24″ twist to drill. Lag size: thru 1″. TO DRI 47017 1 1/16″ x 24″
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