Reliable, Consistent Results

The FabMaster hand grooving system incorporates many of the same design features that Glass Master has perfected for use in its high-volume production grooving machines. It dramatically reduces time spent measuring and locating where to cut. The "no-marking, no-add-ons" design—with easy-to-read, pre-numbered tools—substantially reduces the opportunity for error. The FabMaster is a very valuable tool for every contractor doing fiberglass duct fabrication.

The FabMaster Shiplap Kit consists of the measuring square and hand tool #’s 1, 2/4, 3 and 5S. When ordered with a protective carrying case, a #6 hand tool and a Cuts-All tool are also included. An easy to follow, step-by-step guide to using the FabMaster system is included with every kit. FabMaster Kits, with and without protective cases, are available to groove 1” and 1 ½” board.


Standard Features

  • Lightweight anodized aluminum FabMaster tools are ergonomically designed for an extremely comfortable fit.
  • Large tool sledding areas facilitate smooth, precision cuts and minimize operator fatigue.
  • Cutting blades are constructed of high quality spring steel, sharpened, heat treated and coated for an incredibly long life.


​​The FabMaster Square

  • Adjusts quickly to cut 90°, 75°, 67,5°, 60°, and 45° angles
  • Doubles as a straight-edge cutting guide
  • Folds up quickly into a single, 48-inch-long section for easy storage


Optional Accessories

  • The #6 tool is used to cut both male and female shiplaps simultaneously, and is extremely helpful when shortening duct section length, installing end-caps or making stronger, more precise offsets.  
  • The V tool produces a standard 90° groove for simple closures.
  • Many other versatile Glass Master accessory tools, such as the Cuts-All, Peeler Knife and Round Hole Cutter, can also be added to the set.
  • All hand tools, the Square and the case may be purchased separately.


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