Cal-Flor KI75112 Heavy Duty Flooring Installation Kit for Engineered and Laminate Flooring A rugged set of tools guaranteed to give years of use to professional and do-it-yourself installers Unique pull bar uses magnets to adjust for various floor thicknesses, from 8mm (5/16") to 20mm (3/4") Double-sided wedge spacers adjust to any sized gap for engineered and laminate floors Solid, super heavy-duty tapping block (not hollow!)