The Moore & Wright Spring Joint Internal Calipers are manufactured from polished tool steel. Their bow spring ensures uniform tension over the working range. The adjustment screw is centrally mounted. These spring joint internal calipers conform to BS3123 standards.Select Option 100mm (4in) (Retail Packaging)150mm (6in) (Retail Packaging)200mm (8in) (Retail Packaging)250mm (10in) (Retail Packaging)300mm (12in) (Retail Packaging)75mm (3in) (Retail Packaging) Add to Basket Quantity