An improved tool handle for a resulting tool is configured to be of an ergonomic cross section, such as a rounded triangle or a teardrop. The improved tool handle may include a core of glass strands within a plastic binder, as well as a coating formed over the core that resists penetration of glass strands...http://www.google.es/patents/US6889405?utm_source=gb-gplus-sharePatente US6889405 - Dual material tool handle
