This is two brackets for Creality Sermoon D1 to snap on frame and black grid . Brackets are made for a drag chain "Veekaft mini 10x20 mm" . Use 27 links of the chain, beside the two end links. Seperate 3 links from both ends and cut the small end stop on each 6 links. Also cut this end stop from another two links divided on the main chain for free movement. Use 6 pcs M3x10 with nuts to fasten both brackets to the chain.