This adjustable ipad tablet adapter allows you to attach your tablet to a tripod or other support using a 1/4x20 standard tripod thread. Firm rubber clamps hold the tablet in position. Jaws open from 4-7/8 inches to 7-7/8 inches, and lock into position. The opening is large enough for most tablets on the market. Jaws are 5/8 inch deep, padded with rubber to prevent scratching. iPad and ball head shown in pictures are not included.