Au Sabot Armor London Sailor 10.5cm Pocket Knife Sheepsfoot Stainless Horn Handle with Brass Anchor Honing They are ground extra thin 990422201 They are ground extra thin behind the edge for great cutting feel and ease of sharpening This flattener is used in our shop for flattening stones under 500 grit as those extra coarse stones can damage diamond flatteners by wearing off the nickel plating holding the diamonds 5cm Armor AKA London pattern sailors knife based off the English sheepsfoot mariner knife design This knife became popular with sailors in the late 19th century based off the English sheepsfoot sailors knife design which has several different origin stories