Tri-Knobs 4-Pack by Needlework System 4. The most versatile stitching stand on the market!

• Tri-Knobs are used on all System 4 stands, to hold attachments to the base
• Knobs are made of high quality plastic with metal fittings inside
• Each knob is 1.25" wide and 7/8" high
• This is for one set of four (4) Tri-Knobs
• The Tri-Knobs are easy to turn, tighten and loosen, making adjustments a breeze
• Proudly made in the USA
• All attachments use the tri-knob that comes with the stand to attach onto the stand
• Extra knobs - for your stands, the Radius Arm, the Q-Snap holder, the Belt Scroll Frame, Dowel Sets (not used on a stand), and the Light & Accessory Holder
• Each System 4 component is sold separately - so you can order exactly what you need
• Once you choose your stand, choose your canvas holder, and your accessories
• System 4 products are in stock and ship directly from our Raleigh, NC retail location