Made of cast iron and steel for long lasting durability. Conforms to OSHA Specification # 1910.144 - Safety Color Standards. Furnished with 30,000 PSI gray iron castings and reinforced bar support, enclosed, lubricated, continuous rolled thread main screw design, replaceable hardened steel machinist's (top) jaws, replaceable hardened steel pipe jaws that are set back allow for machinist's vise use and no-pinch main screw handle. Large anvil work surface, 360° interlocking swivel base with two lockdowns. Swivel base equipped with (4) 5/8"diameter mounting holes. Color is Blue. Jaw opening is 3-3/4". Throat depth is 5-1/4". Overall dimensions are 16" L x 10" W x 11" H.