Friction-fit alligator clips slip over the tip of most test leads (2mm). Works with DL369, DL389, DL469, DL479, DM393, DM391 and DM397.From the Manufacturer UEi Test Instruments has over 50 years’ experience designing and manufacturing a broad range of award-winning, industry-leading Test and Measurement Tools. Professionals recognize the UEi brand for quality and innovative features designed to solve real-world problems. UEi backs its products with dedicated technical support, service and repair teams.