Hammer Size (Inches) Shank Type Options Thread Connection Air Presure(Bar) 2 51 BR 2 1 1/2" API Reg 10-14 3 76 DHD 340, Prisma 3 2 3/8" API Reg 10-14 4 102 QL40, M 40, RH 500 2 3/8" API Reg 10-14 5 127 QL50, DHD 350 2 3/8" API Reg 10-20 6 152 QL 60, DHD 360, 3 1/2" API Reg 16-24 8 203 M 80, QL 80 4 1/2" API Reg 16-24 10 254 M 100 6 5/8" API Reg 16-24 https://drillmanindia.com/product/dth-hammer/