OPTIMUM SPEED WITH ADJUSTABLE TORQUE.USER BENEFITS:Optimum speed for processing self-drilled screws.10-way adjustable torque.Metabo Marathon motor with patented dust protection for long service life.Two-piece depth guide, can be fully removed for inspection during operation.Robust depth guide sleeve with front aluminium section.Finely adjustable penetration depth for different materials.Forward and reverse rotation.Quick tool change system.Low-noise claw clutch made from shot-peened fine quality cast for long service life.Vario (V)-Electronics for working at customised speeds to suit various application materials.Robust die cast aluminium gear housing for optimum heat dissipation and durability.Auto-stop carbon brushes to protect the motor.