My wife to me..."How'd you cut yourself"?...."Well..."I know how you do a blind test........you have some blades you want to test. Take them out of the tuck put them in a bowl. Blind fold yourself and pull a blade out of the bowl. Unwrap it and load it in the razor.....easy...then you can take off your blindfold. Now I do admit that this way has it's risks, but.......