Photos show the versatility of the GripBrick and the various positions that can be achieved by positioning and adjusting the cord.
As of May I have a number of grips left that I'm selling at $15/grip + shipping. If interested contact me at sic dot grips at gmail dot com.
GripBricks can be used singly or in pairs and can be used with free weights, weight machines, hanging, or clipped to a knotted sling shut in a doorway to provide a horizontal pull at waist height. I most frequently use them to warm up at the crag or to do strength training one arm at a time with isometric pulls of ~5 secs slowly increasing and decreasing the pull to max strength.
The following two photos show how a girth hitch around the cord knot can be used to adjust the elliptical small and large crimps for positivity and finger contact area.