ITEM NAME:2Pcs/set safety test clip insulation piercing probes for car circuit detectio Kw.After testing, release the button to remove the wire, cable sheath unscathed. direct and conductor, thus to cable signal for nondestructive testing. 1xblack test clip. 1xred test clip. -unique V type line groove design, to ensure that the position of the barbed wire is in the.