Multitec industries offers semi-automatic trigger start clutch type electric screwdrivers manufactured bykilews industries co, taiwan. Features: torque adjustable step less from 0.535 kgf.Cm; torque accuracy ±5%; easy to operate, improves production efficiency; high endurance, and performance model out value its prices paid for purchase; and fit for screwing, assembling common simple kits and products. These are available in various models and operate on 220-240 v ac, 50-60 hz. A spring balancer is also available.