A comprehensive 4mm sliding sleeve safety test set, with contact protected clamp type test probes, safety crocodile clips, etc. for use with multimeters and other equipment that utilises 4mm diameter sockets and plugs, part of the Hirschmann 4mm safety system.

Kleps 250 Contact-protected clamp-type test probe with rotating grip jaws and flexible shaft to clamp wires and pins up to 4mm (red and black)
PRUEF 2 S Contact-protected test probe with slender stainless steel tip for penetration of insulation and oxide layers (red and black)
AK 2 B Safety alligator clip for secure contacting of fine wires, clamping range up to 9.5 mm bolt diameter (red and black)
MLB 100/1 V Contact-protected measuring lead with 4 mm plugs and 4 mm sockets for tower construction on both sides Spring-loaded insulated sleeve is only released by pressure on the side-mounted locking spring (length,100 cm) (red and black)