Introducing the 5/16"-18 128 Piece Jig and Fixture T-Track Hardware Kit by POWERTEC. This POWERTEC exclusive combo was designed to give you a cost effective option to create and customize your t-track jigs & fixtures. It features an assortment of screw on clamping knobs, threaded inserts, t-bolts and t-nuts specifically designed for 5/16"-18 threaded applications. Perfect for a new or an existing t-track assembly – this impressive collection provides you with a versatile set of high-quality components in a variety of shapes, sizes and specifications. It comes complete with a handy clear, plastic storage case that fits all of your hardware, and includes with movable dividers for project and tool organization. An Excellent Value for Any Woodworking Project This kit helps eliminate trips to the store right in the middle of a project. It streamlines your woodworking applications that require jig assembly, repair or customization. With over 128 select pieces, no project is too big or too small. Hardware Kit Includes (20) 1 in. T-bolts (20) 1-1/2 in. T-bolts (10) 2-1/2 in. T-bolts (10) 3-1/2 in. T-bolts (6) 2 in. t-shaped knobs (4) 5-star insert knobs (4) 5-star bolt knobs (6) 4-star insert knobs (6) 4-star bolt knobs (10) 1 in. round knobs (16) 5/16"-18 threaded inserts (16) t-nuts POWERTEC is a leading manufacturer of high quality woodworking tools and accessories, machines, and an assortment of OEM replacement parts. We are committed to exceeding expectations, while bringing the latest innovations, technology, and product development to the industry.