Shank Mimimum Hole Size Number of Splines Mincon DTH Hammer(s)
MQ40 110mm 4 3/8" 12 MQ40
MQ50 130mm 5" 12 MQ50, MQ55
MQ60 149mm 5 7/8" 12 MQ60, MQ65, MQ68
MQ80 200mm 7 7/8" 16 MQ80