Hakko AT-6500B-SET - Brushless Electric Screwdriver with Power Supply and Spring Balancer Torque Range: 3.5 - 17.4 lbf-in (4.0-20.0 kgf-cm) Speed: 700 - 1000 RPM High performance brushless motor Eliminates over/under tightening of fasteners Hakko CHP assembly tools offer brushless and brush type electric screwdrivers to cover various torque ranges with precision control to meet your assembly requirements. Brushless screwdrivers eliminate carbon brushes, minimize maintenance, and are suitable for clean room environments. While the standard brushless series can be used for all electronics assembly, mini brushless screwdrivers are designed specifically for cellphone work and other similar applications. CHP brush motor electric screwdrivers feature large side windows for easy brush replacement, minimizing downtime. Direct plug-in models with a push-to-start function are also available. All CHP electric screwdrivers are suited for the electronics industry with ESD safe design. The screwdriver power supply features stepless RPM control and a soft start for select models. Optional error-proofing power supplies monitor your assembly process to ensure proper and consistent installation. All power supplies can be mounted on the CHP spring balancer for extra space savings. CHP assembly tools also offer high precision torque meters for torque calibration and adjustable screw feeders that increase installation efficiency. The following is an overview of brush electric screwdrivers offered by Hakko. Model Operation Torque Range Speed (RPM) Length Weight Drive Type (lbf. in) (kgf.