Economical Screwback Master Lap Introducing the Economical Screwback Master Lap, a cost-effective solution for precision lap testing. With its robust design and easy-to-use interface, this lap is perfect for small to medium-sized businesses. Ideal for testing screws, bolts, and other fasteners.The 1/4"-20 Screwback Master Support Lap is an essential tool for lapidary enthusiasts. This lap is expertly ground to be both flat and parallel, making it an ideal base plate for other laps. The Full Face Master Lap is 6mm thick and does not come charged with abrasive, providing users with the flexibility to choose their preferred abrasive material.This master lap is designed with a 1/4" 20 thread right-hand configuration, enabling it to fit seamlessly into a variety of cabbing machines that feature a 1/4" female thread on the right-hand side of the shaft. It can also be used with flat lap machines, such as the CrystalMaster 6 and the CrystalMaster 8, that have a 1/4" female thread on top of the arbor.The 1/4"-20 Screwback Master Support Lap is an essential tool for backing a variety of thin laps, including Ultralaps, diamond plated disks, felt pads, and leather pads. With its superior craftsmanship and versatile design, this Lap is a must-have for any lapidary enthusiast looking to achieve precise and polished results.

key features and benefits:

1. Flat and Parallel Design: The Lap is expertly ground to be flat and parallel. This precision in design ensures that the lap provides a stable and level surface, which is crucial for achieving accurate and consistent results in lapidary operations.

2. Base Plate Function: The Screwback Master Support Lap serves as a base plate for other Lap used in grinding and polishing. It provides a solid foundation on which other lap types can be attached for various lapidary tasks.

3. Thickness and Abrasive Flexibility: The Full Face Master Lap is 6mm thick and doesn't come pre-charged with abrasive material. This thickness adds to its stability and versatility. The absence of abrasive coating allows users to choose and apply their preferred abrasive material according to the task at hand.

4. Thread Configuration: The lap is designed with a 1/4"-20 thread right-hand configuration. This design enables it to seamlessly fit into cabbing machines that have a 1/4" female thread on the right-hand side of the shaft. Additionally, it can be used with flat lap machines like the CrystalMaster 6 and CrystalMaster 8 that have a 1/4" female thread on top of the arbor.

5. Versatility: The 1/4"-20 Screwback Master Support Lap can back a variety of thin laps, including Ultralaps, diamond plated disks, felt pads, and leather pads. This versatility allows it to accommodate various lap types, making it a versatile tool for different lapidary applications.