Handle ergonomic multi component handle particulary light and compact handle sizes proportioned to optimise torque setting audible and perceptible click when the pre set torque has been attainedstandards en iso 6798 bs en 26789 asme b10714maccuracy 6 traceable to national standardsapplication for applications where recommended torque settings are important use in combination with a wiha torque interchangeable bladeextra delivered in practical plastic box incl factory calibra