Blocks, 1-2-3

Name: Blocks, 1-2-3
Brand: iGaging
SKU: 1233
Price: 14.76 USD
Availability: InStock
Rating: 4.4 (5 reviews)

$14.76 ~~$19.95~~ In stock

These precision 1-2-3 blocks are ground and case hardened on all sides to 50-60 Rc. The blocks are 1" by 2" by 3". They are parallel within 0.0002", flat within 0.0002" and square within 0.0002".

Each set includes two matched blocks.

The blocks have 23 holes through them, 5 are threaded 3/8"-16 NC, and the other through holes are 5/16" diameter.

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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (4.4 / 5 · 5 reviews)

Claire V. ★★★★★ Oct 22, 2026

Ground and hardened all sides, these blocks check out perfectly against my surface plate right out of the box. The 0.0002" flatness and squareness specs mean I can trust them for setting up any job without second-guessing.

George D. ★★★★★ Oct 19, 2026

These blocks are dead flat across every face, and the 0.0002" tolerance on squareness made setting up a vise alignment on my mill effortless. They stack tight with no wobble at all, so I’ve already used them as a precision stop for repeat cuts.

Mia ★★★★★ Oct 18, 2026

Ground on every face and dead square within two tenths, these blocks check out perfectly against my surface plate. The 50-60 Rc hardness gives me confidence they’ll hold up to years of shop use.