US Patent 7810817 Holder for replaceable tools

A holder for replaceable tools and having a body with an opening along a longitudinal axis for snugly and individually receiving various tools. Two balls are on the body for engagement with the tools, and there is a projection into the opening for contacting the tool in a location diametrically opposite the location of the balls. A sleeve member is slideable on the body, and has two sets of camming ramps and cylindrical surfaces extending radially over the balls for controlling the radially location of the balls relative to the tool. The tool has a surface for abutting the body projection to thereby hold the tool free of radial deviation relative to the holder axis.