The 1/4"-20 Screwback Master Support Lap is a precision-ground, flat and parallel base plate designed to support thin laps like Ultralaps, diamond-plated disks, felt pads, and leather pads. Uncharged and 6mm thick, it offers flexibility to pair with your preferred abrasives for lapidary polishing and shaping.Designed for flat lap machines and cabbing systems.
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Universal Compatibility: 1/4"-20 left-hand thread fits most cabbing machines and flat laps systems ,Thickness: 6mm(e.g., CrystalMaster 6/8).
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Precision Ground: Ensures flatness for uniform pressure distribution during polishing . Secures thin laps for gemstone cabochons, metal alloys, or ceramics.
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Lapidary Work: Back diamond disks for polishing sapphire or agate. Pair with felt pads for final buffing or leather pads for mirror finishes.