All Our Other Accessories -3 Hole Underwater Arm Attachment For Diving Arm System Blue Highlights Generic Brand 3 Hole Underwater Arm Attachment For Diving Arm System Blue Description: The design of the 3-hole butterfly clip transcends the traditional style and improves the limit of use of the butterfly clip. The 1-inch ball arm system features 1-inch ball components with a groove and O-ring to prevent slipping, resulting in better hold, with less force. Underwater, the clamps can be hand-tightened to hold the light in place while allowing repositioning without loosening the clamp. Hard oxidized surface treatment thickened all-aluminum alloy, more scratch-resistant; 304 stainless steel screw spring; Large and wide handle, more convenient and easy to rotate, does not hurt your hand. The 25mm diameter ball mount clamp compatible with arm brands such as ULCS, Ikelite, INON, SEA & SEA... Specification: Material: Air Resistant Aluminum Size: 55mm*55mm*62mm(L *W*H) Weight: 65g Package includes: 1 piece 3 ball hole mounting clamp