Our Teak Patio Furniture is built using Grade A Kiln Dried Teak, using mainly mortise and tenon construction which is well known to be the best and strongest type of joint or connections in furniture. We use some brass fittings & brass sleeves for beauty, but mostly stainless steel parts for high strength. Teak dowel pegs and parts are used in other sections so that the joints can expand and contract as the temperature of the wood changes. Please inspect your furniture on a regular basis and tighten it up a little if it's loosened up due to use or movement.