Alligator clips – teeth can be lined in your choice of colors. I only have these in single prong and they can only be partially lined. I cannot add no slip grip to these clips. The teeth are along the inside top of each clip. I am happy to line these in any colors you would like, color charts are included in each listing. I only have these in standard size which measure approx. 1 3/4″ (45mm) long and 3/8″ wide.