Description: Made of 316 stainless steel, sturdy and durable, anti-rust and corrosion resistant, definitely can be used in seawater environments. Wide Range of Uses: Designed for use with rope, chain, straps, animal leashes and other home, farm and recreational applications. Can be used for a gate latch, a bucket hanger, hanging feed tubs, hay bags in the stall and many other various uses. 120mm Double-ended design makes bolt snaps more versatile. 90mm,100mm,110mm Single-ended swivels 360 degrees for easy and solid attachment. Perfect for sports equipment, marine hardware, leather-craft products, scuba diving, key chains, flag pole, lifting and etc. Specification: Material: 316 Stainless Steel Size Chart: Size: Double-ended: 120mm/4.72inch Single-ended: 90mm/3.54inch; 100mm/3.94inch; 110mm/4.33inch Package Includes: 1 Piece Snap Hook(5 Pack) Note: Conversion: 1inch=2.54cm, 1cm=0.393inch Please allow slightly 0-1cm difference due to manual measurement. Colors can appear different depending on light and how the listing is viewed. Thanks for your understanding and attention. Wish you a pleasant shopping experience!