Shaving armpit hairs with a razor

Is it OK to shave armpit hairs with a razor?

Praise be to Allah, and blessings and peace be upon the Messenger of Allah:

It is permitted, because the object is to remove the hair, whether by plucking, shaving or some other method. Plucking is better, if one can manage it, because the Prophet (peace and blessings of Allah be upon him) said: “The fitrah is five things: circumcision, trimming the moustache, cutting the nails, plucking the armpit hairs and shaving the pubic hairs.” (Agreed upon).