the angles of which are sharper than 45°

There is no difference

T2 5 stones T2 150

Shapton Pro stones are preliminarily lapped and do not require lapping after purchase

curved metallic bonded diamond for edge pro Grit:240 the angles of which areCurved Venev Bonded Diamonds are used for sharpening inwardly curved blades on Hapstone knife sharpeners. Diamond sharpening stones offer excellent performance in sharpening knives of any steel. The working surface is curved. Curved diamonds are designed to sharpen kukris, karambits, hawkbills, scythes and any type of recurved blades. Curved Diamonds consist of a 2 mm thick diamond bearing layer on a metal base. The diamond bearing layer contains