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This Faithful Round Second Cut Engineers File is ideal for filing circular openings or concave surfaces and slightly tapered towards the point, with a double cut finish. For professional and frequent DIY use, fitted with a comfortable handle. Second Cut: approx. 36 teeth per 25mm (Medium).Cut round second Blade Length: 250mm (10in)Blade Width: 9mm (5/16in)Additional Information:• File Type: Handled File• Cut Type: Second• Length (mm): 250