Photo 1 of 12 Pack 1/4-20 Black Star Knobs Star Hand Knob Threaded Knurled Thumb Nuts Thumb Screw Knobs with Bolts for Umbrella Base Replacement Female Threaded Hexagon Head Thru Knob

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Photo 1 of 12 Pack 1/4-20 Black Star Knobs Star Hand Knob Threaded Knurled Thumb Nuts Thumb Screw Knobs with Bolts for Umbrella Base Replacement Female Threaded Hexagon Head Thru KnobPhoto 2 of 12 Pack 1/4-20 Black Star Knobs Star Hand Knob Threaded Knurled Thumb Nuts Thumb Screw Knobs with Bolts for Umbrella Base Replacement Female Threaded Hexagon Head Thru Knob