This professional-grade 2 Piece Mains Tester set delivers reliable voltage detection for electrical work across standard domestic and commercial installations. Both testers feature plain slot blades with insulated sheaths to protect against accidental contact, whilst transparent plastic handles allow you to monitor blade contact during testing. The comprehensive 100-250V test range covers all standard mains applications, making these essential tools for electricians and maintenance professionals. The larger tester measures 190 x 3.5mm and the compact version 140 x 3mm, providing versatility for different working environments. Each tester includes a convenient pocket clip for secure carry and quick access on the job site. Durable construction ensures consistent performance across repeated use in demanding conditions.