The Oxford 300mm/12" Multi-function Combination Set features improved design with high quality cast heads, featuring fully hardened and precision ground datum faces to resist wear. Protractor head and square head both incorporate spirit levels, allowing compound reading when setting jigs etc. Features and Benefits • High quality cast heads for durabiltyt • Fully hardened and precision ground datum faces • Protractor head and square head both incorporate spirit levels Contents • Protractor 360° • Centre Head - fixed 90° angle • Rule 300mm/12" • Square Head - fixed 45° and 90° angles Specifications • Square head with accurate machined faces, fixed angles of 45° and 90°, built-in spirit level and adjusting nut • Centre Head - With fixed 90° angle, for finding the centre of round bar stock up to 120mm diameter • 360° Protractor - Offset arm for accurate readings, full scale graduations 0° - 180° - 0°, and a centrally mounted spirit level vial • 300mm/12" Rule - With deeply etched graduations on both sides, graduated in 0.5mm and 1/64" increments Optional 600mm/24" rule also available.