1" x 2" x 3" Blocks
Including a set of two 1" x 2" x 3" blocks
The 23 holes consist of tapped holes that are 3/8"-16 for clamping and 18 untapped holes
All six sides are precision ground and case hardened and all sides are within 0.0001 per inch of perpendicularity
Made of precision-grade tool steel, cross drilling design can effectively use lower weight and maximum strength