Trimming Router Bits are made by Amana Tool, the leading manufacturers of high quality wood cutting tools. Amana Tool 45463-3TS Carbide Tipped Flush Trim Plunge Template 3/4 D x 1 CH x 1/2 Inch SHK w/ Upper Ball Bearing 3 Flute Router Bit is useful for template/pattern routing of parts, joints, and internal cuts, and can be used in hand-held and table-mounted routers. SPECIFICATIONS: Diameter (D): 3/4; Cutting Height (B): 1; Shank (d): 1/2; Overall Length (L): 3; Replacement Collar: 47739; Replacement Bearing: 47721; Flutes: 3.