Here's a potential better option which might work well for some of the other folks on here that are outside the US. Going to Amazon for your given country, so a search using the string "stainless steel dental tools", and you'll find a wide variety of inexpensive items that might work for you. Here's a link to one package of six (mostly double ended) tools in a nice case for under $11 CAD.
Stainless Steel Dental Tools
Or, you could order the ones you were referring to from the US Amazon site, and pay the $12 CAD shipping fee. You still come out under half the list for it on the Amazon.ca site. But yeah, its frustrating, and there seems to be little logic behind the huge price differential for same items sold on the Canadian site. Even including exchange rates, the Amazon.ca equivalents can be orders of magnitude more expensive. So I consider using Amazon.com on a case by case basic, taking into account shipping costs and perhaps having to pay import duties when it arrives.
Another option to consider, if you have a bunch of stuff you want to order at reduced cost to US customer addresses, have them shipped to your name via a redirection service (UPS offers this), and then just pay for the UPS or USPS shipping fee plus the $5 handling fee. I do this with a UPS store in Great Falls, MT frequently. I get multiple items shipped to their store location under my name, and once they all arrive, they contact me with the cost options to ship to me via UPS or USPS. I make my choice, and then they package it and get it on its way to me. If I need an excuse for a nice drive in the summer, I drive down to pick them up personally. That's obviously not the economical way to do it. lol
So, nattering aside, I'll try to get back on track... depending upon where you're located in Canada, touch base with a UPS store in a US city closest to you, and ask them about redirection services. It's a good option to have when you need it.