Reduce Scrapping and Smelting, Promote Component Reuse > Complete Machines
> 1940 1960
> Cook County
> Delta spur bit 4" diameter 3/4" x 5" shank #15-599 nos
Delta spur bit 4" diameter 3/4" x 5" shank #15-599 nos
Carefully Heat Treated To Give You Tough, Uniformly Hard Cutting Edges For Long Life.
Replaceable Point (Cat. # 15-579)
MADE OF PRECISION GROUND HIGH-SPEED STEEL
The cutting edges are precision ground at the proper angle to bore fast and the chippers efficiently lift chips up and out of the hole.
Brad Point enables overlapping holes to be drilled, making mortises easy.
