ANSWER:

This is an innovation and absolutely not permissible and mounts to shirk. 

My question is in my country a lot of people are using the symbol of the prophet sandal ( na’layn ) like attaching it on bracelets making it as pins and etc, saying that it makes them remember the prophet of Allah and will gives barakah what is the ruling of this?

Shirk and its different forms | April 14, 2019 9:12 am
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Sheikh, what to think of a man who pretends to do istikhara for others, he told my mom to buy a car that would take all the witchcraft others do on her.My brother went to jail and he gave him something to eat saying that he would answer call of nature outside of the prison for that thing he ate.He got out of jail as the man had said.
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THE intention is that he is saying ya muhhamad out of love & to remind himself of prophet SAW (his intention is not to call & ask help from the prophet SAW) is this minor or major sin?