20 Most Recent Stanley 30-305 HI VIS MEASURING TAPE - Page 3 Questions & Answers

Come on. Google is your friend. Also, this has been answered on FixYa before: http://www.fixya.com/support/t8240303-looking_instruction_manual_stanley_fat

You can put it back on but depending on how it broke and how you reattach the measurement will be off a tad.

if defective return

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