Goods name: Screwdrivers Size: 75mm / 3" x 2.5mm, 100mm / 4" x 4mm, 125mm / 5" x 5.5mm, 150mm / 6" x 6.5mm Materials: Carbon steel, Cr-V steel AC voltage test (contact): 70VAC to 250VAC AC voltage test (non-contact): 70VAC to 600VAC DC voltage test: 250VAC Polarity test: 1.5VDC to 36VDC Continuity check: 0Mohm to 100Mohm Microwave leakage detection: > or = 5 mw/sq cm Self-test, extra safe, water-resistant Magnetic screwdriver tip Made of UL-listed PC materials