Trimming Router Bits are made by Amana Tool, the leading manufacturers of high quality wood cutting tools. Eliminate the time-consuming hand-filing that normally follows each trimming cut on a laminate job with Amana Tool 47150 Carbide Tipped No-File Trim .059 R x 1/2 D x 3/8 CH x 1/4 Inch SHK w/ Lower Ball Bearing Router Bit. SPECIFICATIONS: Diameter (D): 1/2; Radius (R): .059 (1.5mm); Cutting Height (B): 3/8; Shank (d): 1/4; Overall Length (L): 1-7/8; Replacement Bearing: 47704; Flutes: 2.