Characteristics: Double head -to -head screw with 1/4 Standard -20 thread on the two precision ends in 1/4 thumb at 1/4 PO MALE AD MALE screw, work with all accessories with 1/ 4 “-20 thread. Multi -functional: can be used with tripods, monopods, telescopes, ball heads, lentil necklaces, lentil plates, etc. Made from all metal, robust and solid Please refer to the size to make sure it works with your camera and the quick clearance plate before shopping. /> Package comprising: 4 pcs 1/4 Male at 1/4 threaded male screw adapter