Made from stability treated, quality, close-grained castings and specially designed for the automotive industry, this series is provided with tapped holes for lifting eyes ideal for heavy-duty applications. Precision ground on all six exterior surfaces, these Giant Cube Parallels can be used for parallel and square references in any position. Tolerances are ±0.010 in size, parallel and square to 0.0002" in 8". Can be matched pairs.