Photo 1 of 1/4-20 Knob 6 Star Knobs, Plastic Hand-Tighten Thumb Nuts, Hex Head Knurled Grip Female Thread Through Hole Clamping Screw-On Thru Knobs, Zinc Plated Carbon Steel, Black, 4 PCS

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Photo 1 of 1/4-20 Knob 6 Star Knobs, Plastic Hand-Tighten Thumb Nuts, Hex Head Knurled Grip Female Thread Through Hole Clamping Screw-On Thru Knobs, Zinc Plated Carbon Steel, Black, 4 PCSPhoto 2 of 1/4-20 Knob 6 Star Knobs, Plastic Hand-Tighten Thumb Nuts, Hex Head Knurled Grip Female Thread Through Hole Clamping Screw-On Thru Knobs, Zinc Plated Carbon Steel, Black, 4 PCS