Totally redesigned to be the only Articulated Arm to lock firmly enough to be able to hold a small light fixture securely. The serrated ball joints and the redesigned end receiver are all part of MSE Magic. The end receiver is a 5/8? Baby Pin on the outside and will accept the standard Dot Finger of Flex Frame pin on the inside and is tapped 3/8-16 internally to receive other camera accessories. Available only in the snap in version for use with Super Mafer Clamp.