The HF-Series brushless electric torque screwdriver is built for precision torque control. The electric screwdriver ensures quality and reduces overall assembly failures. These durable power tools feature a Swiss Maxon brushless motor design, which reduces the standard maintenance costs for electric screwdrivers. With almost no expendable parts and simple design, the brushless screwdriver life cycle is extended and maintains a clean working environment. The screwdriver requires less maintenance and part replacement and provides consistently reliable performance. Using a quality brushless electric screwdriver makes a safer world through accuracy and precision. Requires a HTC35 transformer (power supply). All models are ESD designed and prevent the occurrence of electro static discharge, which improves production yields, manufacturing costs, product quality, product reliability, reputation and profitability. Requires Program Lock Key in order to adjust RPM & Soft Start Settings. Prog