Precise Tin Coated 1-2-3 Blocks - TBS-321

• Titanium nitride surface provides extra and corrosion resistance
• Precision ground & heat treated to 55-62 RC
• Parallel to .0003 on all sides; up to .0003 over allowance for nominal lapping
• Has 23 holes -5 holes tapped 3/8-16, 18 drilled through
• Sold in pairs