1/4 turn 17mm ball head adapter tripod mobile phone tablet support live conversion head selfie stick steering head
*Ball diameter: standard 17mm(Suitable for tablet/mobile phone holder that can be connected with 17mm bracket ball head)
*Base screw hole size: 1/4 or 6mm
*Installation position: above the screw head of the tripod/selfie stick/camera holder
*Purpose: connect the mobile phone/tablet to the tripod bracket so that the direction can be adjusted 360 degrees