1-2-3 Precision Machinist Blocks Set Square Gage Tool Mill Drill Press Setup

These 1-2-3 machinist blocks are crafted for accuracy. Their dimensions are approximately 1" × 2" × 3" with a height and parallelism accuracy of 0.0002". Made from hardened 45# steel, they offer long-term durability without moving parts.

• For checking square alignment on table and band saw
• Use to calibrate fence cursors with precise width
• Check if parts are square before welding or assembly
• Inspect inside angles for 90-degree accuracy
• Offset table or mill from vice for through-machining
• 23-hole design with 5 3/8" 16UNC threaded holes and 18 untapped holes
• No moving parts—tool

• Material: Hardened 45# steel
• Dimension: approx. 1" × 2" × 3" (L × W × H) or 2.5 cm × 5 cm × 7.5 cm
• Height accuracy: 0.0002"
• Parallelism accuracy: 0.0002"
• Hardness: HRC 48–58
• Shape: Square
• Colour: Silver

• Qty: 2 or 4 × 1-2-3 blocks as per your selection