The rectangular razor blade is cut in half and then place in a frame, which slots inside the razor.

cgi.ebay.co.uk/BLUE-STRAIGHT-CUT-THROAT-SHAVING-RAZOR-BLADES-10-/190464293237?pt=UK_Collectables_Barber_Shop_Collectables_LE&hash=item2c588e7975
(Strump striving for imperfection since, Wed 10 Nov 2010, 18:45, 1 reply)

I looked at those
but settled on a fixed blade one. I found the point of the chin awkward, and the whiskers on the top lip seemed to need a good bit more soaking.
The full ceremony takes me about 20 mins too. During the last shave I had on Monday I got the angle to steep and actually planed off a small slice of my cheek. By the time I'd stemmed the bleeding, the bathroom looked like a halal slaughterhouse.
It does take more concentration than just using a Mach 3 etc.
( sandettie light vessel automatic New Twitter - @bollocksreally, Wed 10 Nov 2010, 19:31, closed)

"I got the angle to steep and actually planed off a small slice of my cheek"
This sentence has guaranteed I will never change from disposable safety razors.

*shiver*
( Michael Ellis contributes nothing, Thu 11 Nov 2010, 2:47, closed)