Sidi Motorcycle Boot Tensioner

At some point the tensioner crank on my Sidi motorcycle boots fell off, and I was unable to tighten the straps. This is a low-poly attempt at re-creating a knob to grab on to and turn, a hemi-sphere with a fin on the top (there are probably more technical terms).

The original version has the ability to flip up/down, but as this is my first 3D model my skills aren't good enough yet to design that. Maybe in version 2!