Shank Mimimum Hole Size Number of Splines Mincon DTH Hammer(s)
QL50 130mm 5" 8 MP50, MP55, MQ50*, MQ55*
DHD350R 105mm 4 1/8" 10 55BH, 5DH
SD5 105mm 4 1/8" 8 MP55SD
* QL bits for MQ hammers should be ordered as MQ bits to avoid having to remove the foot valve from the drill bit.