-3 tools in 1: 500mm aluminium rule, spirit level and marking gauge -Horizontal & vertical vials for quick, accurate levelling -4 × adjustable guides - ideal for precise marking and drilling layouts -Dual scales: 0-500mm and centre-out for easy symmetry marking -Lightweight yet tough aluminium - strong enough for site use -Designed for electrical installers and trade professionals who demand accuracy -Compact, versatile and built for everyday use on site or in the workshop