7-1/4" x 44 Tooth x 5/8" Arbor, Composite Decking Blade, Diablo Trexblade Is The Only Recommended Composite Decking By Trex Company When Cutting Composite Decking Materials, Deliver Maximum Performance & Highest Quality Of Finish, Making It A Must Have Tool For Both Professionals & Do It Yourselfers, A Modified Triple Chip Tooth Grind Design, Perma-Shield Non-Stick Coating, & Specific Tico High Density Carbide To Deliver More Efficient & Cleaner Cuts With No Swirl Marks, Less Gumming Of Blade Teeth & Longer Cutting Life.