The Polymer80 PF940CL jig is a tool designed for use with the PF940CL frame, which is a 80% lower receiver for Glock handguns. The jig is used to guide the user in drilling and milling the necessary holes and pockets to complete the frame and turn it into a functional firearm. The jig includes all the necessary drilling and milling templates, as well as instructions, to ensure the frame is completed correctly and safely. The PF940CL jig is made of high-strength polymer and is reusable for multiple builds.