This PlumbCraft 3-1/2-inch basket sink strainer is made of stainless steel and helps prevent clogged drains. From 1-1/2-inch drain pipes, this strainer will filter out solid debris from heading down the drain while also serving as a watertight stopper when filling the sink. The Spin Lock feature is easy to grab a hold of to seal and unseal a sink full of water.Spin Lock watertight seal easy to engage/disengage,A suitable replacement for older sink plugs with worn out rubber washers,Fits standard sinks,Easy to install