Promo keychains are regularly used as an excellent way of continually getting your name in front of other prospective client. You can give this promo items to your potential clients at tradeshow or other promotion event. Each time the promotional item is used, your name is in front of that customer. Therefore, if you want to increase your sales of your business, you have to get ready some promo items so that you can use them at tradeshow. This is one of the best way to increase your customer base.