Heavy-duty cast aluminium construction with milled base and hanging holes. Easily attaches to tool lanyards. Highly visible, UV-resistant 45°, 90° and 180° vials. Accurate to 1mm/m. Heavy-duty cast aluminium construction with milled base and hanging holes. Easily attaches to tool lanyards. Highly visible, UV-resistant 45°, 90° and 180° vials. Accurate to 1mm/m.