Vers-A-Shims are molded from an engineered copolymer material which combines high compression strength and superior load bearing surface contact characteristics. They assure accurate placement of precast and prestressed concrete walls, floors, etc. Vers-A-Shims offer true shim thicknesses with a greater load bearing contact area. Cored-out, hollowed-out shims with less material are cheaper, more apt to fail and lose compression under load. Shims with holes, fancy bumps, interlocks and striations don’t give true surface contact. They can reduce the load bearing contact area up to 70%.