What are some methods of making a precise 0.3mm cut in a handcuff key's bit/blade/flag etc? I know you can get a dremel tool but they are expensive and I cannot even find 0.3mm metal cutting discs in the UK Amazon or eBay.
So if you know of other techniques for just an average joe like myself to make the cut? The cut is depicted on this image:
I will be able to provide measurements as I have accurate 0.02mm callipers. I bought from a different site but here is an image: ?c=2
"The Advanced Handcuff Key 3 (AHK3) is designed to open handcuffs that use alternative security features such as key blocking blades and large keyhole pins. The AHK3 can be paired with a safety pin to assist with turning leverage when opening handcuffs.
Coated Stainless Steel
Compatible With High-Security Handcuffs (Russian BRS, German Clejuso, Korean Yuil)"
Here is from another page which also mentions ASP high security:
"AHK3 (Advanced Handcuff Key)
The AHK3 is the result of end user feedback and subsequent research & design.
The AHK3 features a full depth slit that divides the key flag into two parts allowing it to bypass the security plate on ASP Model 100 handcuffs. Without the full depth slit the handcuff key would be blocked from turning in the keyway. The ASP Model 100 also have security features that make shimming difficult.
Unlike the original ASP handcuff key the AHK3 will work with Russian BRS, German Clejuso, Korean Yuil and other handcuffs that share a similar keyway design."