This stone holder/hand-vise is extremely useful. It is made by
bolting two pieces of hardwood together at roughly the points indicated
below, and then glueing rubber or leather pads at the top. Leather is
better. Tightening of the bolts, first at the bottom and then top will
cinch and hold just about anything until it is loosened intentionally.
Good hardwood can be salvaged from broken wood pallets.
