Made of lightweight durable magnesium¥ Score marks are machined to a uniform depth and specially shaped to help the blade remain flat¥ Has a threaded 3-58" flange¥ Sponge rubber callus preventer and handle included¥ Resilient DuraSoft¨ handle provides a soft feel, reduces fatigue, and offers excellent durability¥ Used for holding plaster during application¥ U.S. Patent Nos. 5,522,111 and 5,713,096¥ Made in the U.S.A.