DIFF Subgroup
B25B 23/1456 Full Title
Details of, or accessories for, spanners, wrenches, screwdrivers (bolt tensioners B25B29/02) > Arrangement of torque limiters or torque indicators in wrenches or screwdrivers (couplings for transmitting rotation or clutches F16D; devices for measuring torque per se G01L) > specially adapted for fluid operated wrenches or screwdrivers