The tinbe-rochin consists of a shield and spear. It is one of the least known Okinawan weapons. The tinbe (shield) can be made of various materials but is commonly found in vine or cane, metal, or archetypically, from a turtle shell (historically, the Ryūkyū Islands' primary source of food, fishing, provided a reliable supply of turtle shells). The shield size is generally about 45 cm long and 38 cm wide. The rochin (short spear) is cut with the length of the shaft being the same distance as the forearm to the elbow if it is being held in the hand. The spearhead then protrudes from the shaft and can be found in many differing designs varying from spears to short swords and machete-style implements.