Dc power cable with 2.1 mm center pin comes in many configurations, including combinations of jacks, plugs, USB plugs, 90° plug and jacks, stripped and tinned ends, alligator clips, and locking dc plug and jacks. Options in white or black, and alligator clips come in red and black.
Locking dc plugs and jacks are designed for an extra secure hold. They are brass nickel plated, with a threaded nut size 5/16-35. They come with a black PVC overmold, but can be customized.