VARI-BIT STEP DRILLING #3-1/4" 3/4" 9 SIZESDrill bits feature a 2 flute design that cuts fast, clean, round holes Enhanced flute design allows drill bits to remove chips rapidly Each drill bit has a steam oxide treatment that adds durability Split point design starts on contact for fast penetration and less walking Drills 1 4"; 5 16"; 3 8"; 7 16"; 1 2"; 9 16"; 5 8"; 11 16"; 3 4" Holes