knob nut: https://www.lazada.com.ph/products/m5m6m8m10m12-female-thread-seven-star-shaped-head-clamping-nuts-knob-i2731951008-s13080353475.html?exlaz=d_1:mm_150050845_51350205_2010350205::12:13240811217!122338965523!!!pla-293946777986!c!293946777986!13080353475!213569991&gclid=CjwKCAjw4ayUBhA4EiwATWyBrv4NdmeA9gj2IHbN6sbR2ZqYKvDBZb5dzxWBwjA8wNSFtZp-yhrwBBoCSZcQAvD_BwE
Butterfly Hinge Clamp: https://shopee.ph/DIOO-2-pcs-set-Silk-Screen-Printing-Metal-Butterfly-Hinge-Clamp-DIY-Hobby-Tool-i.284695599.4943338257