Lisle 64900 17-Piece Back Probe and Alligator Clip Set 17 piece set will include probes that will work with 0.027 inch wire, (3) red straight, 45 degree, and 90 degree, (3) green straight, 45 degree, and 90 degree, (3) yellow straight, 45 degree, and (2) black alligator clips Kit also includes 2 set of probes that will work with 0.040 inch wire, (1) blue straight, 45 degree and 90 degree, and (1) black straight, 45 degree and 90 degree