The Traderight 123 Block Set 23 Holes Machinist - 4 Piece lets you bolt your 123 block to your mill drill press grinder or CNC machine. Jack up your steel bar on your milling machine rather than using parallels.

Key Features

• Ideal for precise mounting work
• Made from hardened 45# steel
• Hardened and carefully machined on all sides
• Used for set-up layout and inspection jobs
• All-round helpful machinist tool
• 23-hole design: 5 3/8" 16UNC threaded holes and 18 untapped holes