Precise 8 Piece 1-2-3, 23 Hole Block & Screws Set – 3402-0055

• Ultra Precision.
• Sold in a matched pair.
• Hardened and precision ground on all 6 sides of each block.
• Accuracy with squareness on all sides within .0001 per inch.
• 23 holes consist of 5 tapped holes that are 3/8″-16 thread for clamping and 18 untapped holes.
• Supplied with a fitted case.
• Set includes a matched pair of 1-2-3 blocks with 23 holes, 5 pieces of 3/8 -16 socket screws, and a hex key.