Milwaukee’s Industrial Test Probes attach to 49-77-1003 Industrial Connecting Test Leads. Designed to withstand up to 1000 volts and 10 amps, this set of test probes used along with 49-77-1003 Industrial Connecting Test Leads and 49-77-1005 Industrial Alligator Clips are ideal for measuring voltage, current and resistance of most electrical systems. Covered by 2 year warranty. Nothing but HEAVY DUTY.