Klein Tools 34055 Ferrule Crimping Tool – Ratcheting Square Crimp for 10-22 AWG

Precision, durability, and control in one ferrule crimping tool

The Klein Tools 34055 Ferrule Crimping Tool is engineered for electricians and technicians who value consistent square crimps and dependable connections. Its ratcheting mechanism and built-in adjustment dial work together to deliver even, repeatable results across a range of 10-22 AWG stranded wire terminals.

Four precision dies create 360-degree crimps that grip ferrules securely, reducing the chance of loose connections in busy electrical environments. The tool’s forged steel body, ergonomic grips, and finely tuned adjustment dial contribute to a comfortable, controlled feel during extended use, while providing the flexibility to tailor pressure to terminal specifications.

What makes it stand out

• Versatile crimping capacity: designed for 10-22 AWG stranded wire terminals
• Secure square crimps: four precision dies produce strong, 360-degree crimps
• Built-in ratchet: automatically adapts to ferrule size for consistent, complete crimps
• Precision tuning: dial offers fine control for accurate, customized results

With more than 160 years of experience, Klein Tools combines time-tested craftsmanship with professional-grade resilience. This ferrule crimping tool embodies those values, built to withstand daily field use and designed with a family-owned, American manufacturing ethos. Expect reliable performance, a solid feel in hand, and smooth operation when it counts the most.

Real-world use cases

• Electrical panel wiring and terminal block work where uniform ferrule crimps matter
• Control wiring, harness assemblies, and durable terminations in service environments
• Fleet maintenance and industrial setups where consistent crimps save time and rework

Design, feel, and reliability

The tool combines a robust build with ergonomic grips that reduce hand fatigue during long sessions. The integrated ratchet ensures complete, repeatable crimps, while the adjustable dial lets you dial in precise pressure for different ferrule sizes and terminal types. It’s a tool that aims to balance comfort with accuracy, making it a dependable addition to any electrical toolkit.

Specifications at a glance

• Crimping capacity: 10-22 AWG stranded wire terminals
• Crimp type: square, 360-degree crimps via four dies
• Mechanism: built-in ratchet with adjustable tuning dial
• Ergonomics: comfortable grips designed for extended use