Cheap and ineffective, don't bother
These are garbage and cheaply made. I saw other reviews to this effect but wanted to save some money and took a chance. Not worth it at all.<br /><br />Maybe 1 in 3 works when used to jump wires. This weak point was the source of much frustration during my project. I can't even justify paying to package them for a return since I'm not near a drop off at kohl's or ups store so I'm just throwing them away.