KEY FEATURES / BULLET POINTS

• 3-SIZE PROFESSIONAL KIT – Complete measuring range with 8″, 12″ & 15″ spring-type outside calipers for general-purpose and shop use.

• ACCURATE OUTSIDE MEASUREMENTS – Ideal for checking outside diameters, thicknesses, widths, and more on pipes, rods, shafts, tubing, and flat stock.

• HEAVY-DUTY STEEL CONSTRUCTION – Precision-hardened steel bodies resist wear and bending — perfect for daily workshop use.

• ADJUSTABLE TENSION SCREW – Fine adjustment and locking screw for repeatable, consistent measurements you can trust.

• VERSATILE & PROFESSIONAL – Great for machinists, fabricators, mechanics, welders, hobbyists, and trade school students.

📦 WHAT’S IN THE BUNDLE

• 8″ Steel Outside Spring Caliper
  https://www.toolusa.com/products/tz4508-out

• 12″ Steel Outside Spring Caliper
  https://www.toolusa.com/products/tz4512-out

• 15″ Steel Outside Spring Caliper
  https://www.toolusa.com/products/tz4515-out

📝 PRODUCT DESCRIPTION

Get accurate outside measurements across a wide range of diameters with this professional 3-piece caliper set. Designed for machinists, fabricators, welders, mechanics, and serious DIYers, this bundle includes the most commonly used sizes — 8″, 12″, and 15″ — so you're prepared for virtually any outside dimensioning task.

Each caliper is built with durable steel construction and features a smooth spring action plus an adjustable tension screw for controlled opening and secure locking. Whether you're measuring pipe, tubing, rod stock, or finished parts, this kit delivers consistent precision you can depend on.

Instead of buying each size individually, this set offers great value while keeping your toolbox lean and ready. Perfect for metalworking shops, fabrication benches, automotive work, welding stations, and home workshops alike.

🛠 WHAT YOU CAN MEASURE

• Outside diameters of pipes, tubes, shafts

• Thickness of metal or wooden stock

• Widths on machined parts

• Parts up to 15″ across

• DIY and professional measurement tasks

📌 TECHNICAL SPECIFICATIONS

• Tool Type: Outside Spring Calipers

• Material: Hardened Steel

• Adjustment: Tension Screw Lock

• Included Sizes: 8″, 12″, 15″

• Measurement Applications: Outside diameter, Thickness & Width