RS PRO 21.3 mm Knob Diameter Black Nut Cover Spindle

A comprehensive range of collet knobs and accessories combining excellent styling with good functional features with a simplicity of assembly.
All collet knob bodies, caps and nut covers are manufactured in nylon with a finely textured matt finish. Collets, housing and nuts are fitted into the knobs during manufacture, made of brass and will accommodate a wide range of shaft lengths and diameters.
Knobs and caps are available separately to allow maximum choice and fixing keys are also available to allow speedy knob fixing.