Diamond lap
A Tried & True Concept in Diamond Bonded Faceting Laps - Light Weight - Low Runout for Faceting Precision and Ease - Smooth Touch for Fast Cutting Performance - Two Sizes, 5 1/4 in & 7 7/8 in Plus Low, Low Price! ! The foundation of the Dyna Disc System is a thin, light aluminum disc that is RIGID and designed to operate at a runout tolerance approaching 0. New proprietary bonding method securely attaches the multiple layers of friable synthetic diamond to the disc. The Dyna Disc system has two requirements for use
A true running master lap for backing plate.

One Precision Adapter is needed so that the lap can be accommodated on a 1/2 in arbor shaft. The adapter is interchangeable so only one is needed for each machine.