Among the drill driver's features you will find an auto-lock chuck system. It runs on a rechargeable battery, so it's completely cordless.
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From Amazon
Bosch Professional 18V System GSR 18V-60 C cordless drill driver (max. torque of 60 Nm, excluding batteries and charger, in carton)
Conrad Electronic
Bosch Professional GSR 18V-60 C 06019G1103 Cordless drill w/o battery, incl. case