Chucks for power tools, namely, collet chuck; tool bits for machines, namely, spring chucks; machine part, namely, tap holders for machine tools; power tool accessory, namely, quick change chuck inserts; boring bar as part of boring machines; variable reducing sleeve sets as parts of machines; milling chucks for milling machines; lathe center as part of machines; small apparatus for machining, namely, machines for the cutting and forming of materials; accessory for machine tool, namely, pneumatic pliers