"Machinable Fixture clamp is a low cost easy to use fixturing option.
The low profile nature allows for good tool clearance while the cam actuation allows for easy, simple clamping.
Made of just two components; a hardened steel screw with an offset head and a machianable steel washer.
Machinable fixture clamps can be machined to suit a profile or machined with a step to allow for through drilling."