Coflex Easy to Install, Fit All, Classic Sink Basket Strainer Easy to Install- foam gaskets included replaces use of Plumbers Putty. 1 1/2 "Lock Nut is easier to tighten than conventional 3 1/2 " metal lock nuts. Stainless Steel Body and Basket. Classic and Functional Design. Fits All 3 1/2" drains on Stainless Steel, Composite Granite, Natural Stone Sinks, with thickness of up to 1/4". Works great with Snappy Trap Drain Kit.