Features and Benefits:�6 in. stainless steel ruler�32nds and millimeters on front, conversion table on back�Permanent and accurate photo-engravings/electrolytically etchings�Sub-zero feature allows 32nds and 64ths readings from right to left below the "0" markThe Empire 6 in. Steel ruler is designed for long-term use. The ruler is crafted with stainless steel for strength and durability and features etched black graduations, allowing measurements to be easily seen.