The Miter T Locking Bolts by POWERTEC. This T slot hardware is designed with a larger head that fits t-slotted miter slots. Similar to our T-Bolts, but these miter tops possess an enlarged oval shaped head that gives you greater project flexibility. The threaded portion is 5/16 in.-18 and 2 in. long. These miter T locking bolts are also extremely useful and offer versatility for a wide an assortment of clamping jigs and fixtures. The 32 in. Aluminum T-Track with Miter Bar Combo A cost effective woodworking duo that works with most standard 3/4 in. x 3/8 in. miter gauges (with or without a t-slot plate). The versatile track set allows you to utilize your existing standard miter gauge in a wider array of benchtop operations. It can work with an assortment of router table, drill press tables, table saw extensions and custom bad saw tables. Unlike other more expensive versions, POWERTEC track and bar set features a center (middle) line guide track - perfect for drilling, project versatility and alignment. The 4-Point Thru Knobs These multi-functional 4-arm knobs provide you with friendly build allows you to utilize a secure hand-grip while maximizing your adjustment and tightening control.The black knob is made with high quality, durable polymer plastic and flaunts an easy to grip design. The knob is 1.5 in. Dia and 1 in. length. It has a 5/16-18 hole thru threaded insert and features a high precision metal construction to stand up to high volume usage, along with wear and tear. Material: Multi Pack.