PRO CHAIN TOOL 3.1. The Apprentice Chain Tool 1.1 is a workhorse designed to make chain removal installation and adjustments simple safe and comfortable. Product Identification & Further Information. - 790983297381 Brand - PEDROS. We will respond to you within 24 hours and do our best to help you out! We use a range of couriers to ensure that your order reaches you in the fastest and safest manner possible. If there are any issues with your order please let us know within 24 hours of the issue arising to ensure that we can help you in a timely manner.