When I was updating this page, then coupon price was 20.99 USD for Adjustable Electric Drill Truck Circular Auxiliary Tool 8mm to 20mm (in Banggood). Price history, coupons and price alert are available on this page. Let’s see what best price is ATM.
Latest price update (UTC time):
Banggood (20.99 USD)
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. You probably want to know if this is a good price. This price is higher than average price (19.99 USD) for this item.
Link: Banggood product page
Price: 20.99 USD
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGWDT15, BG20236Tool, BGdeb327, BGfe0e29
(you can check these old coupons out, but these probably won’t work)
Aliexpress
Here are coupons that you can use.
Price history and price alert
Check out price history chart (for all/most countries) for Adjustable Electric Drill Truck Circular Auxiliary Tool 8mm to 20mm.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).