The Blue Diamond mini series thumbs for machines up to 12,000 lbs. (5,443 kg) have added new features. For example, the thumb now converts to hydraulic simply by removing the stiff arm and adding a cylinder. The stiff arm folds with the thumb when not in use. It is available in 24-, 28- and 34-in. (61, 71 and 86 cm) lengths and has 0.5-in. (1.3 cm) tines and a 1.5-in. (3.8 cm) main pin.