Heavy Duty "Inder" Bench Vices are probably the best of their type any where in the world known for the high quality of design, material and manufacturing standards. - Heavy Duty Bench Vices, Double Rib, Anvil and V. - Block are constructed from high quality grey iron casting of guaranteed strength under compression. - Special Swivel base can be fitted for movement and lock bolt maintains positive lock to avoid slippage under heavy pressure.