Amana Tool fiberglass router (fgr) burs incorporate reciprocating diamond-fluted geometry strong negative rake angles and generous Fluting to provide the best cutting action in a wide variety of woven resin BOND fiberglass and Composite Materials, combining the proven performance of a diamond-cut geometry with the capacity to plunge while leaving a minimum of top-side burr. 135º drill point minimizes part deflection on thin or otherwise unsupported workpieces, #46098, (D) diameter 1/4, (b) Cutting height 3/4, (D) shank 1/4, overall length (L) 2, type drill end, solid Carbide medium burr with 135 degree drill point fiberglass and Composite cutting 1/4 dia x 3/4 x 1/4 shank router bit