The Zeiss L-55 TRipod Ballhead is a low profile ballhead with adjustments up to 90 degrees. The low profile design provides greater stability making this a great option for shooting or glassing. The resistance of the head can also be adjusted to suit the best use for the device you are using. Features3/8'Thread CompatibleErgo Friendly KnobsARCA Swiss Quick ClampBubble Level1/4-20 Extendsion Plate with Keeper Included