Well Made: Each 1/4-20 knob has a brass insert that molded in a plastic knob. The thru knobs have enough threads that are intended to thread on a bolt to clamp them together.
Easy to Use: The star knobs work great as a holding jig, holds steady and requires little effort to loosen and tighten back up.
Female Thread Size: T track knob threading is 1/4 inch in diameter , suitable for 1/4-20 rod.
Handy Design: The bolt can go all the way through the tightening knob, and stick out the top to give plenty of adjustment range, which is handy when the screw happens to be longer than you need it to be.
Wide Application: The screw-on clamping knobs fit for routing jig, saw fence, drill press, lathe, fixture which requires a 1/4-Inch 20 female thread.
Product Name: 1/4-20 knob Colour: Black Material: plastic, brass Specification: 10pcs1/4 inch Packing list: 10pcs 1/4 inch Female Threaded Hexagon Head Thru Knob