Review on 🚪 Harnisch Company DS64-PAK Silencer Metal Door: Noise-Free Solution for Enhanced Privacy by Mike Robinson

Great! Bought these to replace the worn ones on our church doors. DO NOT use the special wire installation tool that fits into the tiny hole you see at the top of the cone. You'll just punch a hole in your muffler. Instead, use a small, flat-blade pocket screwdriver to gently push the cone inward while moving the screwdriver around the cone. IMPORTANT: Apply a small amount of petroleum jelly to the surface of the cone before inserting into the 1/4" to 17/64" hole. The 17/64" bore makes the job a lot easier and holds the muffler just as well, if not better, in my opinion.