$6.99 – Package Contents: 3x Drill Brush Kit (Drill Not Included).
I have checked all old coupons and price is $6.99 for 3pcs Electric Drill Brush Heads (in Banggood). Go down and check coupons out. Remember to check price history if it is available. Do you want to know what the best price is?
Latest coupon code price check (UTC time):
Banggood ($6.99)
Banggood warehouse is located in China. There are no coupons available at this moment in Banggood. Isn’t it too expensive? It’s a good price, isn’t it? The average is $7.33.
Link: Banggood product page
Price: $6.99
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG589b2e
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Check out price history chart (for all/most countries) for 3pcs Electric Drill Brush Heads. The lowest price was: $4.6.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).