https://www.jwwinco.mx/en-us/products/2.2-Tensioning-clamping-with-handles/Star-knobs/FKTH-Polypropylene-Plastic-Fluted-Star-Knobs-with-Through-Hole
Fluted Star Knobs FKTH | JW Winco
Star knobs with brass through insert for consistent clamping strength.
star knobsflutedjwwinco