[SPECIFICATIONS]: The lead screw is 1-3/16 inch in diameter, with single-lead Acme threads and 3 threads per inch. It will accept a 1 inch diameter handle (not included). [DURABLE STRUCTURE]: The structure of the flange and threaded nut is durable,which is made from high strength cast iron with black powder coating. [PRECISION MACHINING]: The lead screw is precision-machined so that it can run smoothly when it is turned on and off. [CLAMPING CAPACITY]: The clamping capacity is 17 inches (less the thickness of the jaw) and total length is 22.8 inches. [APPLICATION]: This heavy duty vise screw can help you build a custom workbench vise. The flange and threaded nut and built for durability with a black powder coat finish. FEATURES OF THE SCREW:

*Good for DIY.if you like making your own customized bench vise. With the solid steel main screw, you'll have a wide range of jaw openings and cast iron body construction that adds durability to your DIY vise.
*The lead screw with single-lead Acme threads and 3 threads/inch is faster than most metal screws which are at 5-6 tpi.
*The screw also has a "T" open handle that allows you to fit a 1 inch diameter handle(Handle not included).