Made of iron for long lasting durability. Provides two (2) closing options. Forward position opens to 8" and reversed opening increases to 11". Large dual anvils. Lower anvil converts to product support shelf when reversing front jaw, replaceable hardened steel top jaws: v-notch, serrated and reversible to smooth. Permanent recessed cast iron pipe jaws allows for machinist vise use, pipe jaws are designed to grip pipe securely. Swivel base securely mounts to work bench (4 - bolts by others), interlocking swivel base 360° motion equipped with (2) lockdowns. Steel beam covers main screw, continuous rolled main screw thread, no pinch main screw handle. Color is Blue. Jaw opening is 3-3/4". Throat depth is 4-3/4" (3-3/4" Reversed). Overall dimensions are 24" L x 11" W x 17" H.