These eye and jaw swivels are used to connect items that require a swivelling joint to prevent twising. For example, twisting of gym equipment like punch bags or chain in boats, or suspended chairs. Manufactured in marine grade stainless. One side of the swivel has a removable pin, whilst the other side is a dee shape. If both sides of the swivel require opening, then choose the Jaw and Jaw swivel. Available in sizes 5mm, 6mm, 8mm, 10mm, 13mm, 16mm and 19mm