Milescraft® BenchLock™ makes it easy to have clamping power where you need it most. Create a versatile clamping station on your workbench, with tool-free installation. Simply, attach your BenchClamp™ to the clamp base, insert the rod through the desired dog hole and tighten the locking knob, and you’re ready to go. Great for holding pocket-hole joints for face frames while screwing them.Features: Convenient tool-free positioning makes it easy to install, remove, and change dog hole locations Use on a workbench or any work surface that has 3/4", 19 mm or 20 mm bench dog holes, or drill your own, maximum top thickness 2-3/8" Rotate BenchLock base 360°, allowing for clamping pressure wherever you need it most Use the pocket-hole alignment accessory for perfect pocket-hole assembly 4 common built-in measurements for board widths: 1.5", 2", 2.5" and 3" Perfect for assembly of: boxes, shelves, picture frames, pocket holes, drawers, and more Specifications: Built-in Measurements: For board widths: 1.5", 2", 2.5" and 3" Compatibility: Use with bench dog hold of 3/4" (19 mm or 20 mm) Maximum Workbench Thickness: 2" For use with: Milescraft BenchClamps Material: ABS and steel What's Included: (1) Milescraft® - BenchLock Base (1) Pocket hole accessory (1) Double threaded rod (1) Knob