Simpson EB-TY Hidden Deck Fastener for Composite DeckingModel No. 175 EBTYP Biscuit Model No. TPO15 Applications Composite decking Material Polypropylene Decking Thickness (in.) 3 4" to 1 1 2" Board Spacing (in.) 3 16 Product Includes EB TY fasteners, 305SS #7 trim head screws, (1) T15 Driver Bit , (10) #10 x 2 3 4" DCU 305SS fasteners for securing starter board and (1) T20 Driver Bit Color Black Packaging Type Bucket Packaging Qty. 175 The EB TY is a polypropylene biscuit fastener that fits into a pre cut