The most comprehensive woodturners chuck package available. The package consists of: NEXUS3R Geared Scroll Chuck with M33 x 3.5 Thread Standard Dovetail Jaws Pin Jaws Stepped Jaws Wide Jaws Face Plate 4 Prong Drive centre Wood Screw T Handle Square Drive T Handle Hex Key Aluminium Storage Case The Nexus3R chuck offers wide compatibility with other chucks on the market. A 4″ sized scroll chuck, with the jaws adjusted by a geared mechanism for simple one handed operation. Self centring, high precision design. Ideal for Midi sized lathes and upwards. The fully enclosed design prevents the build up of chips and dust inside the gear mechanism. The chuck fits directly onto lathes with headstock thread size M33x3.5. For all other sizes an optional insert is required. The locking screws allow the chuck to be locked onto the lathe spindle. Reverse direction should only be used when the chuck is mounted directly onto an M33 x 3.5 spindle thread. It should not be used in reverse when using a thread adapter. Specification Direct Mounting Thread M33 x 3.5 Chuck Body Diameter 95mm Standard Jaws Expand from 53mm to 80mm Standard Jaws Contract from 68mm to 41mm Jaw Travel 27mm Minimum Headstock Thread Length 30mm Weight 2165g THIS LATHE CHUCK MOUNTS DIRECTLY ONTO A LATHE WITH A SPINDLE THREAD SIZE OF M33 X 3.5. PLEASE CHECK THE SIZE OF YOUR LATHE SPINDLE BEFORE ORDERING. Optional thread adaptors are available to mount this chuck onto a lathe with a spindle thread size of : Thread Size / Part number 3/4" x 16tpi / VIPERID. 3/4" x 10tpi / VIPERIK. 1" x 8tpi / VIPERIA. 1" x 10tpi / VIPERIF. 1" x 12tpi / VIPERIG. 1.1/8" x 12tpi / VIPERIM. 1.1/4" x 8tpi / VIPERIE. M18 x 2.5mm / VIPERIH. M20 x 2.0mm / VIPERII. M25 x 2.0mm / VIPERIJ. M30 x 3.5mm / VIPERIN.