FAST DECK MATE - Screw down perfect rows when installing your wood deck. Deck Mate is designed for decking boards with widths of 95, 120, and 145 mm. The template’s hole pattern is designed according to Svenskt Trä’s new recommendations for decking installation. When joining decking boards, flip the Deck Mate over and mark according to the instructions, pre-drill with a 3 mm drill bit, and then screw the decking board in place. This reduces the risk of cracking at the end grain. Designed for 45 mm joists.