Hobart 275889 30 Quart Spiral Dough Hook, ALFA 30DS. Replaces Hobart # 275889 / 478596. Best Style for Pizza. Spiral Dough Hook ("ED" Style). Not for Legacy Models; This Attachment Twists into place. Solid Aluminum. Meets all NSF and US Government Specifications. . This part is sold by Alfa International as replacement parts for Hobart Mixers. Alfa is not Affiliated with Hobart. .