Rock Exotica steel and stainless steel carabiners feature impressive design elements not found on any other steel carabiners in the world. As with our aluminum carabiners, each steel frame is CNC machined along the surfaces that connect to the gate and sleeve. This allows for our trademark precise fit and tight tolerances. It also allows us to use an ergonomic and clearance-maximizing angled gate opening (except for the rockSteel). As part of refining the carabiner even more, we've beveled the edges of the gate and sleeve to smooth the contact surfaces on the working areas of the carabiner.