8 operating elements being parts for hand tools, implements and apparatus, hand-operated, namely handles, levers, cranks and wheels, in particular comprising a sensor and/or electronics for monitoring the status or function of the operating element; locking elements being parts for hand tools, implements and apparatus, hand-operated for securing workpieces or moving parts on hand tools, implements and apparatus, hand-operated, namely twist locks, locking bolts and ball lock pins, in particular comprising a sensor and/or electronics for monitoring the status or function of the locking element; clamping devices and spring-loaded clamping devices being parts for hand tools, implements and apparatus, hand-operated, for fastening workpieces during processing, namely machining, grinding, drilling, milling, joining, welding or soldering, and for fastening moving parts on hand tools, implements and apparatus, hand-operated, namely spring plungers, in particular comprising a sensor and/or electronics for monitoring the status or function of the clamping device; tensioning devices being hand-operated tools or being parts of hand-operated tools, implements and apparatus, namely toggle clamps, in particular comprising a sensor and/or electronics for monitoring the status or function of the tensioning device