For filing circular openings or concave surfaces. Slightly tapered towards point. Smooth Cut: approx. 62 teeth per 25mm (Fine).Second Cut: approx. 36 teeth per 25mm (Medium).Bastard Cut: approx. 26 teeth per 25mm (Coarse).Select Option 100mm (4in)250mm (10in)300mm (12in)350mm (14in) Add to Basket Quantity