?Package Contents? 4 x T Shape Screw Knob, 4 x Gasket. ?Wide Compatibility? Compatible with NEEWER 480/530/660 Bi Color LED Lights (2.4G remote control & app Control versions), RGB LED Lights (app control version), P200 LED Lights (2.4G remote control & RGB app Control versions), and more; Note: Only the screw knob set with gasket is included. ?Universal M6 Thread? Screw into any M6 female threaded hole to replace old, broken knobs quickly and conveniently. ?T Shape Knob Handle? The ergonomic T shaped handles with an almost satin like feel are easy to use. Firm clamping capabilities to firmly secure your light fixtures in position without the need for additional tools. ?Durable Construction? Made of thermoplastic with a highly durable full threaded stainless steel screw design, the knobs can resist scratches, and will not become brittle or crack easily.