The wire is decent thickness,the ends themselves feel rubberized and not hard slick plastic like some other types of cables you find. They are silicone test lead cables. Silicone wires are very soft , very flexible, very nice to work with. Good test cables for your lab. Every electronic techie out there should have these cables. These are useful little leads for all sorts of elecl and electronic work. Add this to your meter bag. when you need a third hand, or have to test many circuits sequentially, this is an absolute necessity. nice rubber insulation and the banana plugs mate easily with a regular bench power supply or a regular meter. 1m flexible test cable. Voltage: 1000V;Current:15A. Banana Plug: 4 mm. 3.3 ft wire with nice rubber insulation cover and the alligator clips,fork insert made of copper. The clips make it easier to grasp the battery you are trying to read, allows hands-free testing, great for remote spaces. Sturdy Banana Plugs and the silicone insulation greatly enhance durability and flexibility of the leads that prevents the "memory" characteristic of plastic insulation after it has been rolled/wrapped for a period of time. Plugs fit well into other leads and tests sockets. Combined test leads - The package come with two double-end Banana plugs + two alligator clips + two copper fork insert. You can use banana plug insert to alligator clip, Copper fork insert to crocodile clip; Double ended banana plugs, Banana plug insert to copper fork insert