1-2-3 Blocks Gage Set Machinist Tool for Setup Layout Inspection 1 Inch x 2 Inch x 3 Inch

123 blocks are precision tools designed for machinists and workshop professionals. They are essential for setup, layout, and inspection tasks on various machines, ensuring accurate measurements and alignments.

• Hardened and machined on all sides for enhanced accuracy
• 23-hole design featuring 5 3/8" 16UNC threaded holes and 18 untapped holes for versatile mounting options
• Constructed with no moving parts for durability
• Ideal for setup, layout, inspection, and alignment verification
• Effective for checking inside angles and square accuracy

• Material: Hardened 45# Steel
• Hardness: HRC 48-58
• Dimension: Approx. 1" x 2" x 3" (L x W x H)
• Height Accuracy: 0.0002"
• Parallelism Accuracy: 0.0002"
• Shape: Square
• Type: Gage Block

• Qty: 2 or 4 x 1-2-3 Blocks as per your selection