If you have Olfa utility knife like this SVR-1 ( [ Ссылка ] ) then it will eventually dull and you'll want to snap piece of the blade off. This is a quick and easy procedure, but one you'll want to do safely. Here is how you do it. This video also explains how you change out the blade for a new one when you've run out of new sections.
Olfa Replacement Blades: [ Ссылка ]
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