$12.99 – Material: Diamond Steel, Application: Glass / ceramic tile / marble / granite and other brittle hard materials., Color: silver, Diameter: 10/25/40/55/70/85/100 mm, Quantity: 7pcs, Length: 5cm.
I have checked all old coupons and price is $12.99 for 7pcs 10-100mm Diamond Hole Saw Drill Bit Set (in Banggood). Check coupons or create price alert down below. What is best price?
Latest coupon and price update (UTC):
Banggood ($12.99)
Banggood warehouse is located in China. There is no active coupon in my database right now (for Banggood). But wait a sec… Is it a good price? I have never seen better price than the current one in CouponsFromChina database, so it’s the best!
Link: Banggood product page
Price: $12.99
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG58face, BGGines, BGTACC18, BG589b2e, BGHTT15, BG20236Tool
(probably won’t work, but you can try them out)
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
Price history (for all/most countries) for 7pcs 10-100mm Diamond Hole Saw Drill Bit Set is here. The lowest price was: $12.99.
Price records source(s): 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)).