Festool 494870 Domino Tenon, Sipo Mahogany For Outdoor Use, 6 x 20 x 40mm, 190-Pack Sipo Mahogany for outdoor use, 6 x 20 x 40mm, 190-Pack All-natural, solid Sipo hardwood for strength and stability in outdoor applications where a strong joint is needed Serves as a true floating tenon in outdoor applications such as decks, exterior trim, and outdoor furniture Flat, elongated design will not rotate, ensuring perfect alignment for both edge and face gluing Embossed with glue pockets, and is approximately 2mm shorter than nominal length, allowing space in the mortise for glue.