Rampa insert type SKZ
Rampa wood screw-insert, type SKZ with inner-hexagon drive, unthreaded lead to facilitate mounting. Made out of die casting, so cheaper but softer.
Rampa wood screw-insert type SKZ is only available in die cast and can be mounted without special tooling in softer wood.
Thanks to the unthreaded lead, the insert will fall into position before starting to screw, what ensures mounting in the rigth angle (that follows the drilled hole).
(Zamak is a family of alloys with a base metal of zinc and alloying elements of aluminium, magnesium, and copper.)