Apex Tool Group LLC based in Sparks MD is one of the largest worldwide producers of industrial hand and power tools tool storage drill chucks chain and electronic soldering products, Positive toggle lock holds blade securely at any length for accurate measurements , Chrome or easy-to-find Hi-Viz orange case finish available , Self-compensating end hook for inside and outside measurements , Patented Quad Hook extends blade life by reducing blade breakage , Built in product life SKU: ORSNO53218