Double cut teeth for filing slots, keyways, grooves, rectangular holes, internal corners and for fine-adjustment of cutting tools. Slightly tapered towards tip for surface filing. Smooth Cut: Approx 62 teeth per 25mm (Fine). Second Cut: Approx 36 teeth per 25mm (Medium). Bastard Cut: Approx 26 teeth per 25mm (Coarse). Size 300mm (12in) Cut: square bastard. Tanged. BAHSB12