DACROMET FINISH (Rust Protection) INDUSTRIAL BUILT HIGH QUALITY swingset hangars - perfect swing set brackets for all swing set products indoors or outdoors including gymnastics rings ceiling mounts, porch swing springs and hanging aerial yoga inversion trapeze swings seats. Dacromet coating is a high end rust preventative - please see further down under Product description 'RUST' for more information. QUIET and SMOOTH HARDWARE - custom vinyl washers specially designed to prevent metal rub creating a quiet, smooth, exceptional swinging! Adults experience the kids and grandkids big smiles as they enjoy their playset swinging accessories during spring, summer and fall swinging seasons on their backyard wood play sets equipment DIYers - exceptional quality swing set hangers these top of the line parts are for use inside / outside home, rafter, beam, cedar, wood, concrete, tree to create your own playscape or hammock chair swings