Conical handle
Black duroplastic.
Threaded blind hole.
Ogival handle
Bushing in galvanized steel and threaded blind hole.
Ball knob
Red duroplastic.
Equatorial groove. Blind threaded hole.
Equatorial groove. Threaded blind hole.
Equatorial groove. Brass bushing and threaded blind hole.
Equatorial groove. Self-locking bushing in nylon.
Equatorial groove. Smooth hole.
Swiveling pin in galvanized steel, threaded, with hexagonal locking socket.
Brass bushing and threaded blind hole.
Push-pull knob