Sold in 4 and 10 packs, our patented and universal Base 4 Stands Jam Nut is designed to make the final positioning of a microphone easy and secure. Made of hard aluminum and feather light, at 5mm thick and 34mm in diameter, our Jam Nuts have alternating knurled and scalloped features, allowing you to firmly grip and secure your mic clips and shock mounts in place, preventing unwanted rotation.