House Brand Dentistry Endodontic Reamers 21mm #30, Stainless Steel 6/Box. HSB - House Brand Dentistry's Reamers Stainless Steel, model 400507, are high-quality tools designed for endodontic procedures, measuring 21mm #30. Sold in packs of 6, these durable reamers are essential for shaping and enlarging root canals.Their robust stainless steel construction ensures reliable performance, while their cutting edges effectively remove dentin for precise canal shaping.