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

A set of precision 1-2-3 machinist blocks for accurate setup, layout, and inspection work on mills, drill presses, grinders, CNC machines, and band saws. The hardened steel construction with precisely machined surfaces and 90-degree angles provides reliable alignment checking and calibration.

• Perfect 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—durable long-term 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