8" Cast Iron/Zinc Polishing Lap - 1/2" Arbor Hole 

Cast Iron provides a rapid pre-polish and the Cast Zinc center quickly gives a final polish. The Cast Zinc center is harder than Tin alloy laps and produces flat facets quickly on the hardest of colored stones. These versatile laps are useful for hard stones and synthetics.  These laps allow for pre-polish to polish without the need of a lap change or any changes in machine adjustments… saving much time, especially when doing multiple stones.