$15.99 – 13mm Threaded Keyless Metal Drill Chuck / Hex Shank/SDS/Square Quick Grip Adapter / Chuck for Drill Bit Screwdriver Tap&Sockets – 13mm Drill Chuck Set.
When I was updating this page the price was $15.99 for 13mm Threaded Keyless Metal Drill Chuck Hex Shank/SDS/Square Quick Grip Adapter (in Banggood). You can create price alert here, copy coupons and view price history. Best price?
Latest coupon code price check (UTC time):
Banggood ($15.99)
Banggood warehouse is located in China. I don’t think there is an active coupon right now – at least in my database. The question is – is it a good price? Well, this price is higher than average price ($12.49)
Link: Banggood product page
Price: $15.99
Additional Banggood coupons: first page and second page
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 13mm Threaded Keyless Metal Drill Chuck Hex Shank/SDS/Square Quick Grip Adapter. The lowest price was: $11.99.
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)).