Trimming Router Bits are made by Amana Tool, the leading manufacturers of high quality wood cutting tools. Use Amana Tool 47114 Carbide Tipped Flush Trim 1/2 D x 1 Inch CH x 1/4 SHK w/ Lower Ball Bearing 3-Flute Router Bit for laminate work and for template & pattern work. For template applications, the bearing follows the template, while the cutting edges trim the workpiece. SPECIFICATIONS: Diameter (D): 1/2; Cutting Height (B): 1; Shank (d): 1/4; Overall Length (L): 2-5/8; Replacement Bearing: 47706; Flutes: 3.