This clamp is made of sturdy plastic with 2 - 2 1/4" rubber suction cups, a special turn buckle that can span 5" for tightening.  It is mainly used for seaming small pieces like backsplashes and for other small pieces over 2 1/4".  The design is similar to the SR2X but smaller and has no seam adjustment wedge.  This clamp is not designed to pull large seams together.