20 Most Recent Stanley Fatmax Xtreme Retractable Utility Knife - Page 4 Questions & Answers

http://www.stanleytools.com/en-us/~/media/StanleyTools/Files/Product%20Manuals/Baccus%20Products/J7CS_ManualENSP_061914.pdf,J7CS

push and hold the button in as you slide it back

Don't touch the blade by hand use a pair of pliers. There should be a screw in the center of the handle, just remove it and you will see how to remove the blade.https://youtu.be/pFnbiw88Z8c

if this a tape measure, then pull the old tape all the way out. hold the spring end, unhook the tape and put the new tape onto the spring end. Let it wind back up

Use a 12 volt wall adapter. Use a 12 cigarette lighter cable or leave it commected to the car battery for a while .