Lotus - Model FD 4 -4 Inch DTH Hammer

4” DTH Hammer, with Top connection Threads 2 3/8” API – IF PIN, Shank Type –  Sandvik SD 4. SUITABLE BUTTON BITS : Flat face(Optional – Concave Face). Dia – 4” ( 102 mm), Dia – 4 ½” ( 115 mm). Dia – 5” ( 127 mm), Dia –  6” ( 152 mm). Dia – 6 ½” ( 165 mm).