1-2-3 TIN COATED BLOCK SET

• Heat treated and case hardened to HRC 55 to 60.

• Hardened and precision ground on all 6 sides of each block.

• Accuracy with Squareness on all sides within .0002" per inch.

• 23 holes consists of 5 tapped holes (3/8" - 16 for 1-2-3, 5/8"-11 for 2-4-6)for clamping and 18 untapped holes drilled.

• Cross drilling design gives minimum weight and maximum strength.

• MATCHED PAIRS AND SOLD AS PAIR