A combination square with 300mm long, hardened steel sliding rule marked in both metric and imperial units. * Handle can slide along the rule and be clamped at any position * Heavy-duty die cast metal body * Brass nut and scriber fittings * Handle also features a spirit level and 45° angle * Uses include inside and outside try-square, mitre square, spirit level, 45° level, depth gauge, height gauge and marking gauge * Rolson type 50858