DeckWise Ipe Clip - Extreme 4 Fastener System - 5/32" Spacing -Gray Clips - 1050 pc Contractor Bucket for 600 Sq. Ft. of Decking - (Includes 8 x 2" Stainless Steel Screws) Automatically spaces deck boards at 5/32" (4mm) For edge-mount grooved hardwood deck boards ensuring smooth surfaces Lab tested to be up to 3X stronger than other edge-mount systems without steel inserts Molded polypropylene with hardened stainless steel insert for added hold-down Allows for expansion and contraction of width of kiln dried hardwoods