Elesa+Ganter I.481+x Revolving handles
Material
Phenolic based (PF) Duroplast. Resistant to solvents, oils, greases and other chemical agents.
Colour
Black, glossy finish.
Assembly
Black-oxide steel shoulder screw, cylindrical-head with hexagon socket.
A knurling acts as obstruction when the handle is fully screwed into its hole (the screw threaded end must be slightly chamfered).