Affordably priced, these mixer accessories are of very good quality. This dough hook fits the 60-quart Hobart H600 mixer and related models. Made of cast aluminum, this item is NOT NSF-approved. If you need an accessory that IS NSF-Approved, see our product # 60DS. (This accessory, like all accessories for "Classic" Hobart mixers, TWISTS into place. It will NOT fit a Hobart Legacy mixer..