Socket for socket spanner has flexible aperture with concave and convex curved surfaces

摘要

The socket has a flexible aperture. It consists of a socket body (1) with an aperture (2) in one end. This aperture has several multiple concave curved surfaces (21, 21'). For each two adjacent concave curved surfaces, there are also two convex curved surfaces (22, 22'). There is a recess (23) between the two convex curved surfaces.