Prevent record slippage on the platter as well increase inertia of the platter (helps overcome Wow & Flutter). It has a strobe to check 33/45 rpm and a spirit level to check that the turntable is completely flat – absolutely essential to set up a turntable correctly. They are solid polished alloy or black and new in box.
Follow this link to read our article about Receord Weights & Clamps: (about 1/3 down the page)
http://classic-hifi.net/category/turntables/