Also jikukugi 軸釘, kakemonokugi 掛物釘. A hook for hanging scrolls, *kakemono 掛物, that is made of metal or bamboo and hammered into the upper part of the back wall, or the bottom edge of the ceiling molding of a tea ceremony alcove, *tokonoma 床の間. Metal jikukakekugi are bent twice to form a three-pronged trident shape. If made of bamboo, the hook is hammered straight into the wall, or with a slight upward incline in a rustic style tea ceremony room. Bamboo nails are 0.63 cm long and are nailed 2.8 cm below the ceiling molding, projecting from the wall. Around the late 16th century to the early 17th century, in *shoin 書院 style tea rooms one, three, four, or eight scrolls were hung and each had a hook. When three hooks, mitsukugi 三ﾂ釘, were used, the right and left ones were made smaller and projected 3 cm. When a set of three scrolls, sanpukutsui 三幅対, were hung in a large shoin style room, a board 6-8 mm thick, 12-30 cm wide, and 180 cm long was nailed to the bottom edge of the ceiling molding and a groove was made so that the inserted zigzag-shaped nails could be moved easily.