Amana 45212 Straight BitNew generation of high wear outstanding carbide. New superior geometric design. New advanced automatic grinding technology that improves the carbides resistance to wear. Super clean cuts. 200% longer life time even when working with abrasive materials. Cost effective. Specifications: D= 9/32 inch B= 1 inch d= 1/4 inch L= 2 1/4 inch 2 Flute Carbide Tipped Super clean cuts 200% longer life Cost effective