Simpson EB TY EB316W Premium Hidden Deck Fastener Kit w 2 1 4 in. Type 305 SS Screws 275 Pack Mechanical Anchors Body flatness achieved through special Body flatness achieved through special straightening processes and full factory balancing means the blade tracks true at up to 7 providing greater strength and structural integrity at every connection point Stainless steel reinforced biscuit with increased pullover resistance the integrated Type 300 series reinforcing plate adds structural stiffness that holds deck boards securely and reduces the risk of boards lifting or shifting over time which helps extend the life of the wood