Vilros Deluxe Heavy Duty Hammer-in Header Rig for Raspberry Pi Zero--Easy Pinheader Installation Solution for a Raspberry Pi Zero--No Soldering Required--Includes 2 Headers

Works, but...

It worked, but I used a small "C" clamp to squeeze it together instead of hitting it with a hammer. worked great!

Secure and sturdy addition

I've used the acrylic header rig and ended up breaking one after two hammerings. The acrylic header rig quickly gets indentions from the header pins too. The metal header rig is more sturdy and definitely gets the job done more cleanly. With the additional header pins included in the package, this was a good deal for future needs.