This is a stainless steel spring snap hook with a captive eye (also commonly referred to as a marine snap hook with eyelet or an interlocking eye carabiner).
Key Structural Features
Captive Eye Loop: The most defining feature is the integrated metal ring enclosed at the base. This "eyelet" permanently isolates the attached line, rope, or cable. It keeps the primary rope from slipping out, shifting position, or jamming when the main spring gate is opened.
Spring-Loaded Latch: It utilizes a smooth, pivoting gate that snaps shut via an internal mechanism to provide rapid and reliable temporary locking.
Marine-Grade Material: It is typically forged from high-polish 304 or 316 stainless steel, which delivers excellent resistance against fresh water, salt water, and environmental rust.
Common Applications
Boating & Sailing: Permanently spliced onto the ends of dock lines, halyards, or mooring fender ropes for fast deck attachments.
Sun Shade & Sail Rigging: Anchoring shade sails to wall pads or tensioning wire ropes.
Fitness Equipment: Connected to cable gym machines or resistance bands, keeping the machine's cable securely fastened through the eyelet while allowing the main hook to cycle through different handle attachments.
Industrial Safety Tethers: Creating secure lanyards for tools or light rigging lines where the connector cannot be allowed to slide freely down the line.
If you are setting this up for a project, let me know what you are tying or clipping it to (e.g., a boat line, gym cable, or structural tie-down) so I can guide you on choosing the correct load rating.
