2 Precision 1-2-3 Block 23 Holes Milling Machining 123 Blocks Set of 2 precision Ground Steel 1-2-3 Blocks Blocks size: 1" X 2" X 3" Tolerances are guaranteed to .0001 for squareness per inch and to .0002 for parallelism 18 Plain holes and 5 threaded holes ( 3/8"-16tpi) Quantity: 1;The coin is US quarter, NOT included