4mm stackable test lead with retractable shrouds truconnect 17 2848 blue test lead supplied with a stackable 4mm plug at both ends the plugs have a retractable shroud fitted so as the plug is pushed in the shroud is pushed backwards into the plug no more burns due to arcing or flashover resulting from exposed ends on test probes each high quality pvc cable is cat iii approved to 1000v truconnect 4mm stackable test lead 110cm with retractable shrouds blue