Ironwood or also known as (Eusideroxylon zwageri) is a type of wood that comes from tropical forests in Southeast Asia, especially in Kalimantan, Indonesia. Ironwood has various advantages that are very profitable in various products. This type of wood has extraordinary strength and durability so it is resistant to extreme climate changes. Ironwood also has a beautiful appearance with varying colors, from light brown to brownish red and fine wood grain. (Ulin)