Crain Tools No. 821 Jamb Saw Blade

Crain Tools No. 821 Carbide‑Tipped Jamb Saw Blade The Crain No. 821 Carbide‑Tipped Blade is the OEM replacement blade for Crain undercut and jamb saw models 812, 820, and 825. Featuring a 6½″ diameter and 40 precision carbide‑tipped teeth, this blade is engineered to deliver exceptionally smooth, splinter‑free undercuts in wood doors, jambs, baseboards, and drywall. It’s built from a rigid, precision‑formed steel body and optimized for clean transitions in tight inside‑corner applications. Not suitable for cutting masonry, tile, stone, or metal. Specifications Blade diameter: 6½″ (approximately 165 mm) for full undercut coverage Tooth count: 40 carbide‑tipped teeth for fine, accurate cutting  Compatibility: Fits Crain No. 812 Super Saw, No. 820 Heavy‑Duty Undercut Saw, and No. 825 Heavy‑Duty Undercut Saw  Material: Carbide‑tipped on precision-formed steel body Weight: Approximately 6 oz (≈ 0.17 kg)  Usage warning: For cutting wood or drywall only—do not use on metal, masonry, s