First align and insert the fasteners in the centre of each joist against the first row of decks, then insert the second row of decks, finally tightening the hidden fasteners. Fastener Type Square. 【Premium Material】The Hidden Deck Fasteners are made of high quality nylon plastic, have strong durability and good corrosion resistance, adaptable, tough enough, suitable for indoor or outdoor decking panels hidden fastening.
eBay