Aliexpress
Click here… to search for DANIU 6pcs 6mm-12mm Pivoting Ratchet Set on Aliexpress
Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. So I have checked for active coupons (all category coupons and old ones), but there was no working coupon in Banggood.
Link: Banggood product page
Price: -3 USD
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): 360607, 502C6B, e2bcea, TOOLS15, TS15prime, TISPrime01, BG2020NS, BGVDay10%off, BGMPB2020, BG6WRENCH, BGAFF10OFF, e2ba61, BGDANIU, BGherra, BGDNSPA, ., BG6d3909, BG592dca, BG59d2bc, BGGines
(these coupons are old, so probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for DANIU 6pcs 6mm-12mm Pivoting Ratchet Set.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).