(under subclass 199) Device including detailed characteristics of a portion of the tool or tool-support generally concentric with the tool-axis and adapted to be readily attached to or detached from a torque transmitting tool-supporting member.
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238, for a tool-support having portions of configuration to supportingly engage a particular tool.
713, for an art grouping of patents reciting a separable tool and tool-support wherein the details do not include details of an element that is generally concentric with the tool-axis.