Fowler 52-439-001-0 Steel 1-2-3 Blocks

Features:

• 1-2-3 Blocks-tolerances  guaranteed to 0.0001" for squareness per inch.
• Available in two styles-with one or thirty-one holes. Blocks are matched in pairs and measure 1" x 2" x 3".
• Very useful in mounting work for precision grinding, layout work, etc.
• Blocks hardened to 58-60 Rockwell C.
• Ground to surface finish 6-10 microinches
• Matched accuracy within ± 0.0002"
• Price per pair