*Special Hl-MOLY tool steel, gold surface treated
 body and clearance for maximum lubricity
*Close tolerance construction
*3 flats on shank 
*This high performance tool is designed to 
 enlarge existing holes by as much as160% of
  the existing hole diameter
*The 4 flute design and modified “Hole Hog” 
 point prevent catching and hogging - in 
 commonly experienced when S & D drills 
 break through thinner material such as
 truck frames
*The flatted 1/2" shank makes this tool 
 extremely useful in portable drilling
*Set contains: 1 each  core drill sizes : 3/8, 
 1/2,  5/8 & 3/4 1 each drill sizes 1/4, 5/16,
 25/64 & 15/32