Variable speed models allow stepless control of drilling speed between minimum and maximum enabling finer control of finish and tolerance. Side knob control allows speed to be adjusted whilst machine is running. Digital LCD panel on front displays rpm. Meets CE Machinery Directive 98/37/EEC, Low Voltage Safety Directive 79/23/EEC and EMC Directive 89/336/EEC. Safety devices fitted include a no-volt release switch, allowing insurance company approval for use in educational establishments. Supplied with chuck guard.