CAT IV Test Lead Kit comprising:,Pair of highly flexible in-line silicone insulated fused test leads 1.5m long for additional reach. The two part screwed fused carrier accepts a 6.3 x 32mm high power fuse ( 2 x 0.5A & 2 x 1.6A supplied with each kit),Pair of plug-on probes with Stainless steel 2mm tip.,Pair of plug-on Jaw Grips with 20mm opening steel jaws especially suited for connection to ground rails and thick cables. The jaws outer surfaces are insulated to prevent inadvertent contact with adjacent conductors.