1. The all-metal design and copper shell brings effective shielding. Thickened solder pad and thickened fixing clamp shall be used for the connection point. 2. The gold-plated plug features oxidation resistance and stable contact performance. 3. The plug comes with M6 x 0.5 internal thread.It has a special interface for wireless microphones. 4. Suitabel D12 / D21, for , for and other Lavalier wireless microphone, along with M6 internal thread special plug. 5. Friendly reminder:This plug with internal thread design can only be used for 3.5mm female port with thread, such as , for , for and other Lavalier wireless microphones. Interface Type:3.5mm Stereo with M6 internal thread Colour: Material:Metal Package Contents: 10 * 3.5mm Screw Lock Stereo Jack Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.