Salice has a new, heavy-duty, concealed, undermount drawer slide: F70. The F70 comes with 154 lbs. dynamic load rating and a 170 lbs. static load rating. It exceeds Ansi 156.9-2020 Grade 1, but unlike similar products, the price range makes it practical for every drawer in the house, not just the oversized applications, the company says. F70 has a full-extension with synchronized movement.