WEN 25 x 50 x 75 mm Steel-Hardened Metric Precision 123 Blocks, Two Pack in the Woodworking Tool Accessories department at Lowes.com
Shop Operations: A fresh look at 1-2-3 blocks | Cutting Tool Engineering
123 Machinist Blocks
Ultra Precision 1-2-3 Blocks Set | All Industrial Tool Supply
WEN 10423 3 x 2 x 1-Inch Steel-Hardened Precision 123 Blocks, Two Pack — WEN Products
1-2-3 Block Clamping | Model Engineer
TTC Precision Ground 1-2-3 Block Sets
waltyotur Ultra Precision 1 x 2 x 3 Inch Blocks 23 Holes Accuracy 0.0002 Inch Suitable for Milling Machines for Setup, Layout and Inspection Jobs 1 Pairs - Walmart.com
1 x 2 x 3 Inch Blocks Set 1/2" Single Hole Matched Pair 123 Blocks with One Hole Hardened Steel Precision Ground Machinist Set Up Blocks for Precision Grinding Layouts: Amazon.com: Industrial & Scientific
123 Block Attachment Hardware Kit — Taylor Toolworks