Amana tool's 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., #48010, (D) diameter 1/8, (b) Cutting height 1, (D) shank 1/8, overall length (L) 2, type end mill Poin, 48010 Solid Carbide medium burr with end mill point fiberglass and Composite cutting 1/8 dia x 1 x 1/8 shank router bit