House Brand Dentistry Endodontic Reamers 21 mm #15-40 Stainless Steel 6/Box. HSB - House Brand Dentistry's Reamers Stainless Steel 400504 Premium 21mm reamers, sizes #15-40, are sold in packs of 6, designed for precision in endodontic treatments. Crafted from durable stainless steel, these reamers offer strength and wear resistance.Their optimal cutting action effectively shapes root canals, ensuring a smooth and tapered finish. Ergonomic handles enhance control and reduce fatigue during procedures.