Powerful spring provides heavy-duty grip for microphone and prevents mic from dropping. Also strong spring makes the opening much more wider and the space fit great majority wired or wireless handheld microphones such as SM58, SM57. Standard 5/8inch female threaded insert,connects to the compatible mic stand, gooseneck, boom, retractable tripod mic stand or other accessory. Knob can be adjusted your satisfied angle and make you in a comfortable situation while you are singing, chatting in game,live broadcast,etc.