ISC Big Dan Screwgate Carabiner

The Big Dan is constructed from steel rather than aluminum, which significantly increases its durability and strength. At 50kN, it offers a much higher breaking strength than typical climbing carabiners, making it better suited for heavy-duty industrial or rescue applications where safety margins are critical.

Yes, the 27mm gate opening is quite generous and accommodates most standard anchor points, thick ropes, and webbing loops with ease. It is designed specifically to prevent the frustration of struggling to clip into bulky hardware.

The zinc-plated finish provides a robust layer of corrosion resistance, which is essential for steel gear that might be exposed to the elements. It helps protect the metal from rust and wear over time, ensuring the gate mechanism continues to operate smoothly.

While it meets CE EN 362 safety standards, this carabiner is primarily designed for industrial, rescue, and rigging applications. At 335 grams, it is significantly heavier than standard climbing carabiners, so most climbers will find it too bulky and heavy for personal climbing kits.

The screwgate is designed for manual locking, which typically requires two hands to unscrew and open, though experienced users can often operate it with one. This manual action is a deliberate safety feature to ensure the gate cannot be accidentally opened during critical tasks.