Abstract: A rotary cutting tool comprises a body having opposite ends and a plurality of diametrally opposed pairs of flutes forming cutting edges extending helically from one end of the body toward the opposite end. All of the cutting edges are circumferentially spaced uniformly from one another at the one end of the body. Each cutting edge of one pair of edges is formed on the same and uniform helix, whereas each cutting edge of another pair of edges is formed on a uniform helix which varies from the cutting end of the body toward the opposite end. The steepness of the helices is such that no flute communicates with any other flute and, at a zone between the ends of the flutes, the cutting edges formed by such flutes again are uniformly circumferentially spaced from one another.

Abstract: Product design apparatus and methods including a product database server operable to display a plurality of product styles, a plurality of customizable attributes, and a plurality of composite images. The database server is accessible by at least one client computer operable to select a product style having customizable attributes based upon choices presented by the product database server and elections made via the client computer. The product design server is operable to display a custom product design by combining a selected product style with one or more of the available attributes. Graphic displays including a composite image having the selected product style and the selected customizable attributes are transmitted via the database server to the client computer.