ALL-CARB 2-4-6 Blocks Matched Pair with 23 Holes Precision Machinist Milling 0.0002In

2In x 4In x 6In, 17 lbs. Weight Made of hardened tool steel and precision ground on all six sides 0.0003 height accuracy precision matched blocks for mounting work for precision Precision steel blocks Has 23 holes with 5 holes tap to 3/8-16 threads for clamping and 18 untapped holes This steel blocks can be used for set-up, layout and inspection jobs. Suitable for all kinds of machine tool