3" x 4" x 1/4" Plastic Interlocking Shims - 400 Pack for Furniture Leveling, Door Installation & Flooring Projects - Heavy Duty Leveling Wedges for Home Improvement and Construction

No matter how you stack ‘em, these shims stay together! Traditional wood shim products have long been used in the building industry and present a variety of limitations - rotting, shrinking and swelling as well as others. Invented by a window installer to simplify the use of Multiple shim applications in window installations, Glazelock Shims reduce material and labor costs and provide a secure and stable solution to your shimming needs