598,659. Tool-holders. CLARK, R. H Oct. 16, 1944, No. 19976. Convention date, Feb. 21. [Class 83 (iii)] A tool-holder, the elongate shank of which has a flat bottom surface, has an elongate head projecting from the forward end of the shank, the forward end portion of the head being angularly disposed and laterally displaced relative thereto, and a polygonal tool-carrying socket extending lengthwise through the head and opening at the forward end face thereof, whereby the socket is angularly related to the shank, a clamping arrangement for a tool extending substantially parallel to the forward end face of the head being adapted to clamp the tool towards one corner of the socket. The shank 21, with an enlarged head 24 at one end, is provided with a socket 12 for a tool 13. The tool is clamped by means of a block 14, Fig. 4, rotatably secured to a clamping screw 16, the lower face of the clamping block being notched to engage the tool and wedge it against the lower and side walls of the socket. A roundsection tool may be similarly clamped.