Ryan Woodruff, North Carolina Aquatic Club
Often at practice it is helpful to have a tool to communicate with your swimmers while they train. I like to use a normal laneline wrench to bang on the stainless steel gutter. I use it to have the group change speeds during a long swim, shift from one drill to another, stop to kick, or any other task we are doing. Use one bang for a certain command, two for another command, and so forth. Swimmers can hear the wrench bangs far better than a whistle or any other noisemaker I have heard.