Screw packs widely using on camera accessories such as Tripod, Monopod, Ballhead, light stand, video light. <br> <br> <b>2 pieces 1/ 4 inch to 3/ 8 inch male double stud adapter <br></b> The adapter screw is designed with one end measuring 3/ 8 inch and the other end 1/ 4 inch. The maximum length is 20 mm and the maximum width is 16 mm, threaded part on each end is 8mm, suitable for all kinds of gear with 1/ 4 inch to 3/ 8 inch screw hole. <br> <br> <b>2 pieces 1/ 4 inch to 1/ 4 inch male double stud adapter <br></b> The adapter screw is designed to have two 1/ 4 inch male threaded screws. <br> The maximum length is 20 mm and the maximum width is 16 mm, threaded part on each end is 8mm, suitable for all kinds of gear with 1/ 4 inch <br> <br> <b>2 pieces 1/4" to 3/8" Tripod Screw Adapter Converters <br></b> Inner 1/4 thread part works with 1/4 male screw and the external 3/8 threaded part works with 3/8 female screw. Screw it to the 1/ 4 inch to 3/ 8 inch male double stud adapter, then make it work as a 3/8" to 3/8" thread.<br>