The Rock Solid Mini-ProClamp
from Tether Tools is a
lightweight aluminum grip tool that allows you to mount small
accessories to flat or round surfaces from 0.5" to 1.5" thick. The
clamp has a large sliding bar handle for quick locking and a rubberized
interior to protect whatever you are clamping to. The Mini-ProClamp has
a female 1/4"-20 and a 3/8"-16 threaded socket to accommodate a wide
variety of grip accessories.