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Klein Tools SN-58B ratchet crimper, black oxidised steel jaws, red rubber handles

Klein Tools SN-58B Ratchet Crimping Tool 24-16 AWG

SKU CH-1Y38-3CSAA

Hand crimper with ratcheting mechanism crimps open-barrel terminals from 24-16 AWG and features adjustable pressure plus emergency release

  • Item Count1 pack
  • Selling UnitKit
  • FeaturesWidely Use
  • Effortless crimps thanks to a full-cycle ratchet mechanism that auto-releases
  • Consistent results every time via adjustable pressure star wheel
  • Secure connections for open-barrel terminals across 24-16 AWG range
  • Durable high-carbon steel jaws with black-oxide finish resist rust and corrosion
  • Comfortable ergonomic rubber handles reduce hand fatigue during repetitive use

Klein Tools SN-58B Ratchet Crimper

The Klein Tools SN-58B is a hand-operated ratchet crimping tool built for open-barrel terminal connectors. Its full-cycle ratchet mechanism ensures each crimp completes before the handles release, delivering consistent results on every cycle. The frame is constructed from high-carbon steel with a black oxide finish for corrosion resistance. An ergonomic soft-rubber grip reduces hand fatigue during repetitive work.

Suited for 24-16 AWG open-barrel terminals

This crimper targets technicians and installers who terminate open-barrel contacts in the 24 to 16 AWG range. The adjustable pressure wheel lets operators fine-tune crimp force for different terminal sizes, while an emergency release allows mid-cycle abort if a wire shifts. Builders who need insulated lug crimping, coaxial connectors, or larger gauge wire ferrules should look at a different tool profile.

Handles 0.25-2.5 mm² cross-sections

The tool accommodates wire cross-sections from 0.25 mm² up to 2.5 mm², covering the stated 24-16 AWG span with repeatable pressure. The ratchet locks until the crimp reaches full closure, preventing under-crimped joints on thin wires. It runs out of range above 2.5 mm² or for closed-barrel terminals, where a different die set or tool geometry is required.

Highlights

  • Effortless crimps thanks to a full-cycle ratchet mechanism that auto-releases
  • Consistent results every time via adjustable pressure star wheel
  • Secure connections for open-barrel terminals across 24-16 AWG range
  • Durable high-carbon steel jaws with black-oxide finish resist rust and corrosion
  • Comfortable ergonomic rubber handles reduce hand fatigue during repetitive use

Specifications

BrandKlein Tools
Item Count1 pack
Selling UnitKit
FeaturesWidely Use
Part NumberSN-58B

Questions about this item

Which open-barrel terminal connectors does the SN-58B accept?

The tool crimps open-barrel terminals that suit 24-16 AWG wire, covering the 0.25-2.5 mm² range stated for the ratchet mechanism.

Can I still use my older non-ratchet crimp dies with this tool?

The SN-58B is a fixed-frame ratchet crimper; it does not accept interchangeable dies, so older die sets cannot be fitted.

How do I verify each crimp is consistent after I set the pressure knob?

After adjusting the star wheel, the handles will only release once the full cycle completes, confirming a uniform crimp every time.

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