A shaped insert that includes a top portion, and a grip length, wherein the grip length is modified to have a non-uniform cross sectional area is disclosed. In another case, a shaped insert includes a top portion, and a grip length, wherein the grip length is modified such that the insert is non-cylindrical. In another case, a shaped insert includes a top portion, and a grip length, wherein the grip length is coated in a non-uniform manner.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application claims benefit to U.S. Provisional Application Ser. No. 60/494,867, filed Aug. 13, 2003. This provisional application is hereby incorporated by reference in its entirety.
