Allen is a registered trademark of that corporation.
Optional Indvidual pieces shown:
Clamp - A-91503:

Beach Chair Counter Traction Strap - A-90015:

Universal Head Positioner - A-90026:

Plate and Pad - A-91502:

Allen is a registered trademark of that corporation.
Optional Indvidual pieces shown:
Clamp - A-91503:

Beach Chair Counter Traction Strap - A-90015:

Universal Head Positioner - A-90026:

Plate and Pad - A-91502:
