how do they get holes in extruded profiles?

how do they get holes in extruded profiles? plastic t slot extrusion Buy 2pieces Plastic Nylon T Slot Black Door Handle for Aluminum Extrusion at Aliexpress for Find more , and products Enjoy ✓Free Shipping Worldwide! plastic slot Shantou Xinhua Packing Machinery Co , Ltd is a leading manufacturer, supplier, and factory of plastic T slot extrusions in China Our T slot extrusions are

plastic slot These corner pieces will come with either 2-6 slots per piece The way it works is the extruded poles have an adapter piece that slides onto the

plastic t slot extrusion This T-nut for 3030 extrusions doesn't require a hex nut or brass insert, as the bolt is screwed directly into the plastic T-nuts for classic hex nuts Aluminum T-slot profiles are a modular framing solution for your 8020 project SAEfractional or metric profiles available in a variety of shapes and