• Durable black phenolic plastic knob, .375-24 Threaded, 2" Diameter
• Smooth turning action, minimal force required
• Use with the  L-Track Fitting Threaded Stud Fitting, Simply place your item over the threaded stud and twist the four-arm knob into place to secure the item

This Four Arm Knob makes tightening things simple and fast. Works great in L-track situations where you are frequently moving stuff around.