Review on Blackout Trimming Cutting Cut Off Clear by Firman Harrington

I don't quite understand how the template is supposed to be or why it doesn't have any instructions or markings at all to place or cut the shroud I understand it wasn't expensive, but a picture and a short description would be a fantastic idea so it's actually helpful. It would be nice if it actually held the sleeve in place when cut or met SAMMI's specifications for OAL sleeve length if cut where it needs to be with a jig. There are better products out there, don't waste your time and $15 on this junk