1-2-3 Precision Blocks

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The 1-2-3 Block is a precision steel block with a 0.0003" overall tolerance. They feature 5 tapped 3/8-16 holes, as well as 18 untapped holes. Perfect for a variety of applications like using for offsets, setting up magnet base dial-indicator arms, or setting offsets like Z0 (see below.) How to use 1-2-3 Blocks to set Z0 Made in China Show more