The Manfrotto 338 QTVR Leveling Base allows you to make fine finger tip adjustments of ±5° to ensure the camera is perfectly level. There is a built-in spirit level for reference and the base has a 3/8 inch female thread to mount on a tripod or any other support. The tripod head mounting is via a 3/8 inch male screw. It features a spirit level with a sensitivity of 0.50° three thumb rings for fine level adjustment and three grub screws located on the top plate of the base that allow you to lock down the tripod head firmly.The 338 QTVR Leveling Base is ideal for use with stitching and VR programs. It allows you to work more easily with photo stitching software programs to create seamless panoramic photos every time.