CNC machined aluminum splits molds are made in house to provide accurate long lasting tooling! We machine the pieces out of 6061-grade aluminum. These will not warp over time like the HDPE molds are prone too. the two sides can be pinned together with 3/8" pins. You can mount them to any flat surface and using the 3 5/16-18 threaded holes on the bottom side of the molds.