The Deli DL8001 Electrical Voltage Tester is a reliable and essential tool for electricians and DIY enthusiasts. Designed to efficiently measure AC voltage ranging from 100V to 500V, this 140mm tester features a durable 40Cr steel shank with a nickel-plated finish for superior rust resistance. With a hardness rating of ≥50HRC, it is built for long-lasting, heavy-duty use. The ergonomic handle and compact, easy-to-use design make it perfect for testing sockets, switches, and narrow electrical spaces with high safety and precision.