The three-hole butterfly clip design breaks through the traditional style and enhances the use limit of the butterfly clip. Made of aluminum alloy hollow. All-aluminum alloy hard thickened oxidized surface treatment, more scratch resistant; 304 stainless steel screw spring; wide and large handle, more convenient and easy to rotate, does not hurt the hand. The diving clamp mount for Diameter 25mm ball compatible with arm like ULCS, Ikelite, INON, SEA&SEA. Material: Aluminum alloy colour: black Package Contents: 4 x diving clamp mount Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. The three-hole butterfly clip design breaks through the traditional style and enhances the use limit of the butterfly clip. Made of aluminum alloy hollow. All-aluminum alloy hard thickened oxidized treatment, more scratch ; 304 stainless steel screw spring; wide and large handle, more convenient and easy to rotate, does not hurt the hand. The diving clamp mount for Diameter 25mm compatible with arm like ULCS, Ikelite, INON, SEA&SEA.