These pocket-sized promotions can deliver a major value as giveaways. But, How does one get them to probable customers? Create a return on investment decision by sending prospective customers promotional keychains during the mail with other details about your business.tst ivm.clk mmh2 clkh2 achf nopl spfp4 uam1 lsph nmim1 slnm2 crtt spfp misp spfp1