PARKER Spare Blades
Spare-blade pack from Parker. Each pack features 5 blades suitable for all double-edge safety razors.
Unscrew the razor head completely. Keeping the razor head in a fixed position while unscrewing may help in some cases where the handle is too tight. Place a blade between the two parts of the head. Screw the handle back on all the way, without using too much force.
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