Rock Exotica’s F1 Mini Eight is equipped with a two horn pronged ear on one side for added friction options. This configuration allows the user to employ multiple wraps to aid in control. This device will work with ropes as thick as 13mm. The 8 is also soft anodized, which makes it less likely to develp sharp edges. This little guy is H-O-T. If you enjoy a good rappel mission, the F1 Mini Eight should be in your arsenal.