$11.99 – Thickness: 2mm, Size(Lx W): 300x 25mm, MMeasuring range: 300mm, Material: Aluminum alloy + Stainless steel.
You can get Drillpro Adjustable 300mm Aluminum Alloy Combination Square Scriber for $11.99 using coupon code (in Banggood). Basically copy coupon, view price history or create e-mail price alert. You probably want to know what is the best price?
Latest coupon code price check (UTC time):
Banggood ($11.99)
Banggood warehouse is located in China. There is no active coupon in my database right now (for Banggood). Low/high price? According to my database, the average price is $13.16 and current price is $11.99, so it’s probably a good price!
Link: Banggood product page
Price: $11.99
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
Old coupons (from the oldest to the newest): BG9a4fc2, BGDRB18, BG900e09, BGd7a4e0, BGcc20e7, BGaf9443, BGfcaa26, BGc9a6a2, BG19018a, BG41677, BGGines, BGWT15, BGa0b557, BGc8412f, BG3e3e3d, BG53e685, BG19a665, BGWDT15
(I don’t think these’re gonna work, but you can try ’em 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
Price history (for all/most countries) for Drillpro Adjustable 300mm Aluminum Alloy Combination Square Scriber is here. The lowest price was: $7.99.
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)).