This is international standard precision made 1/4"to 3/8" Threaded Screw Adapter.
Material: Aluminium alloy And Stainless Steel (metal)
22 Pcs Camera Screws Pack: 5 Pieces 1/ 4 inch to 3/ 8 inch male threaded screw adapter 5 Pieces 1/ 4 inch to 1/ 4 inch male threaded screw adapter 5 Pieces 1/4" female to 3/8" female screw adapter 5 pieces 1/4 inch female to 3/8 inch male screw adapter 2 pcs D-Ring Screws