A fitting (10) is formed from by clamping first and second clamp bodies (12,14) of composite plastic material together, each of the clamp bodies being covered by a pressed stainless steel shell (36,38). Each of the clamp bodies (12,14) defines a grip formation (16) that faces a recess (26), so that an edge of a glass panel can be gripped between the grip formations (16)—preferably with soft pads (18). Fasteners such as bolts pass through apertures (24,25) extend through the shells (36,38) and bodies (12,14), to hold the entire fitting (10) together and to exert a gripping force on the glass panel.