... clutch 4 stepless regulation 5 torque range: 0.02-1.7N.m TDA-9800 DC semi auto electric screwdriver Model NO ... .TDA-9800working voltDC18,24,36Vspeed700rpm,1100rpm,1300rpmtorque range0.02-1.7N.mapplicable screwM1.2-3mmbit diameter4mmtorque precision±0.3%torque adjustablestepless ...