It operates at a single speed (or 'off'), the keyed chuck was replaced a while ago with a keyless one to save the faff!
BOSCH GSB18RE 110Volt Hammer Drill with keyless chuck
Bosch professional 110Volt drill
Dewalt 110Volt hammer drill
Metabo KHE 2660 Quick 110volt Hammer Drill with Case
Bosch Cordless Rotary Hammer Drill UniversalHammer 18V (1x Battery 2.5 Ah, 18 Volt System; Drilling/Hammer Drilling/Chiselling; 2.0 J Impact Energy, SDS Plus Tool Holder, in Carrying Case)
Bosch Cordless Rotary Hammer Drill UniversalHammer 18V (Without Battery; 18V System; Round-Shank Adapter; Drilling/Hammer Drilling/Chiselling; 2.0 J Impact Energy; SDS Plus Tool Holder; in Carton)
