The how to guide to manufacture a 45 degree set in Electrical trunking, step by step clearly showing how to make to a set measurement. This method uses an angle grinder although an hacksaw would be also as good (the method I normally use to demonstrate to students in a class safer). Looks as good or better than a bought one. Lid not shown but out of all lid to make, this again is the easiest. This how-to guide will help you master this essential skill. Perfect for precise measurements in your electrical work!