Flat File, Machinists, American Pattern, Cut Type Flat Bastard, Rectangular Shape, Length 6 In, Width 0.629 In, Thickness 0.157 In, 30 Teeth per Inch, Steel Material, Taper Slightly Towards Head, Single Cut Edges, Recommended Handle 1NFW5, Used Most Often By Machinists, Machinery Builders and Repair Personnel When Rapid Material Removal Is Required