These titanium nails are like a blast from the past! We've been sitting on these for a while and we want to let them go at a crazy discount. These nails will only work on a rig with a male joint, and we have them in three different sizes, just be aware that if you attempt to put one of these nails into a rig with a female joint the nail could fall down into the downstem and would be very difficult to remove. These could be used with a joint that has a female rig if you purchase one of our Male to Male Ground Glass Adapters in the size that fits your rig. The solid cylinder at the bottom of the nail will go down into the joint, and the adjustable center piece will sit on top of the rim of the male joint. If you've got a rig with a male joint, or your feeling nostalgic for some classic concentrate action, then pick up a few of these titanium nails today!