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

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.