Works with DL489, DL429, DL429B, DL419, DL389, DL379B, DL479, DL469, DM505, DM515, DM525, DM393, UTL291, UTLDM1, UTLDM2, UTL33T, DMEG3, IRT3 Fits industry standard input jacks Silicone test set, which are more flexible, more heat and burn resistant, more chemical and solvent resistant, when the current ones get damaged and are no longer usable