Description: No need to remove the cable, no damage to the cable; Puncture and crimp the cable with a thread, free both hands; Suitable for cables with a diameter of less than 4mm; Can be used to connect weak electrical test leads below 36v; 4mm standard female banana socket at the end, most test and diagnostic devices can be connected. Specification: Operating voltage: 30VAC or 60VAC Max Current: 1 ampere Max Color: red, black Size: length about 12cm/4.72 inch, hole diameter 4mm/0.16 inch Package includes (without retail package): 1 Piercing test clip Note: 1. Transition: 1cm=10mm=0.39 inch2. Please allow 0-1cm error due to manual measurement. Pls make sure you don't mind before bidding.3. Due to the difference between different monitors, the image may not reflect the actual color of the item. Thank you!