Made of high-quality 6061 aluminum, anodized. Ensures maximum durability and reliability Aluminum tooling plate fixture plate dimensions are 10" x 10" x 1/2" All threaded holes are 1/4-20 threaded holes and shipped in 4PCS 1/4 -20 mounting bolts A necessary pallet fixture for bench drill/tapping machine workbench/welding workbench/milling workbench and other scenarios.