Once installed on the track, this fitting can handle 4,000 lbs. of pressure, so it's great for a variety of tie uses. The D-ring fitting is large enough to accommodate s-hooks, snap hooks, and 1" wide webbing. A pliable black rubber covers the spring to protect it from rust and corrosion. The heavy-duty plastic base keeps the fitting lightweight and easy to handle, while the flanged edges make it comfortable to grip and push into place.