Yes, if you are instructed to do so with their provided Katha/Mantra. If you don't have the amulet Katha/Mantra with you, or you already own an amulet in-hand long time ago and don’t have the particular Katha /Mantra.

Before you go out of the house, hold the amulet’s with both hand press together in a praying position and slightly touch your forehead and chant the following Mantra with full faith and trust will make the amulet more effective, you will be blessed.

Namo Tassa Bhagavato Arahato Samma Sam Buddhassa  (x 3)

Putthang Arathananeng, Dhammang Arathananeng, Sangkang Arathananeng  (x 1)

Putthang Passitimay, Dhammang Passitimay, Sangkang Passitimay  (x 1)