SIMPLIFY INSTALLATION: HALO pre-mounting smash plates simplify LED recessed lighting placement in new construction projects, ensuring precision and speeding up drywall cutting VERSATILE COMPATIBILITY: Designed for use with HALO canless LED downlights and adjustables, these plates support 3”, 4”, and 6” round fixtures and 4” and 6” squares. Use the breakaway tabs to convert the hole template from round to square SECURE & CODE-COMPLIANT: Holds LED lighting fixture space, prevents misalignment, and helps meet lighting code requirements by providing adequate support BUILT-IN MEASUREMENT TOOLS: Features V-notches, tape measure retention slots, and an imprinted measurement scale for accurate positioning and hassle-free installation TRUSTED PERFORMANCE: Designed and tested in the USA, HALO has been the go-to brand for contractors for nearly 70 years, offering unmatched reliability and quality. Products are backed by a 5-year limited warranty