Powertec 71168-P2V T-Track Hold Down Clamp, 5-1/2" L X 1-1/8" W, 4 Pack, T Track Introducing the Universal Hold Down Clamps by POWERTEC. This hold down clamp set provides you with a heavy duty and reliable solution to keeping your t-track/ t-slot workpieces in place. Each clamp is designed to fit firmly in your universal t-track/ slot assembly, providing you with high-tension clamping action. Premium Build + Innovative Design Featuring our unique lever shaped profile, these woodworking accessories deliver exceptional hold-down clamping action. They also flaunt an impressive clamping capacity for a wide assortment of task, while providing the user with optimal workpiece clearance. The POWERTEC Hold Down Clamps are constructed out of heavy duty anodized aluminum, built for long-term usage without the worry of corrosion or wear and tear. We?ve added ergonomically designed 5 star knobs to give you full-range control. This makes adjusting, tightening and securing your material a breeze. To protect your workpiece, these clamps are highlighted with non-marring rubber clamping pads. Whether you?re a professional or DIY enthusiast, these beefy clamps offer hassle free productivity and streamlined workflow. They?re easy to use, and even easier to love. Hold Down Clamp Specs Length: 5-1/2-Inch Width: 1-1/8-Inch Body: Anodized Aluminum Pads: Non-Marring Rubber Knob Type: 5 Star T-Bolt: 3-1/2? L with 5/16?-18 Thread Package Includes (4) hold down t-track clamps (t-bolts, washers, caps, knobs included) 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. INCLUDES: (4) Hold Down Clamps for T-tracks/T-slots; (4) 5/16-Inch-18 thread 3-1/2-Inch long T bolts; (4) Washers; (4) 5/16-Inch-18 thread 5-star knobs FUNCTION: Provides exceptional clamping action for your universal t-track system configurations and assemblies FEATURES: Ergonomically designed 5 star knobs, non-marring clamping pads, and a high tension clamping capacity DESIGN: Made from premium grade anodized aluminum with a lever shaped profile ensuring optimal leverage in addition to work piece accessibility VERSATILITY: Hold Down Clamp Set is ideal for work holding, positioning, and fixturing for many woodworking or metalworking applications, including routers, drill presses, CNC, table saws, jigs, panels, vertical mills and more PLEASE NOTE: Our t-bolts, both 1/4"-20 and 5/16"- 18 have a head size of 17/32" wide x 13/16" long and 7/64" thick (Please see drawing). They are designed to fit Universal T-track or larger and will not fit 1/4" or Mini T-track. Please check the size to verify that they will work for your application.