MAXDRILL coupling sleeves (1) Size: R25,R28, R32, R38, T38, T45, T51 Can be used on Cop series, Tamrock, Ingersoll-Rand, BBE and Montabert series rock drill. (2) Length: 140mm-235mm (3) Package: in wooden case or in carton. (4) Productivity: 5000pcs/ month