Weller WBTS35L Electric Screwdriver Product Features: (clutch) Clockwise / Couterclockwise switch Quick change 1/4" hex Accuracy +/-10% over six sigma Brushless motor - clean room safe Quiet a55dBA, vibration free ESD safe housing, CE certification Compatible with WTSD and WTSA power units 0.5 to 3.5 Nm torque range Speed: 800 Rpm Lever start - manual torque adjustment