will the 5100a work for 8 or 10 AWG wire and lugs of the type provided with the "battery spot welding" kits?

These are meant for factorty tuck and roll cable ends

Will this work on molex open style connector pins

for larger wire sizes, maybe. you would need to look at actual Molex pins to see whats required on open style connector pins also keep in mind this tool is also between 8 and 10mm wide ( see pictures ) if the crimp length on the pin is shorter, you will be crushing the wire insulation also as a side note - if you are going to crimp a lot of connectors, I would get the table top model https://www.amazon.com/gp/product/B07VPHDXG5

What thinnest gauge can 5100A crimp?

The crimping tool goes from 5 amp to 100 amp lug. The five amp plug is real small the largest you would get largest would be 18 gauge wire 22 Gage wire would be the lowest gauge. This tool is very well made and worth the money.

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IWISS iCrimp Battery Cable Lug Crimping Tool for Open Barrel Lug,Lead-Free OEM Battery Terminals,B Type Crimper for AWG 13-3

Product ID: 272902214

Details

Brand
IWISS
Colour
Blue
Grip type
Ergonomic
Handle material
Alloy Steel
Item weight
2.8 Pounds

💪Ergonomic long handle for leverage

⚙️Wire EDM precision jaws

🛠️One-piece high-grade steel head

₩193469

Duties & taxes included

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Sold byAmazon South KoreaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Crimp like a pro — precision, power, and durability in your hands!

BUILT TO LAST - Crafted from a single piece of special tool steel with rust prevention for unmatched durability.
EFFORTLESS POWER - Long ergonomic handles with 5 rivet joints deliver maximum mechanical advantage and reduce fatigue.
PROFESSIONAL GRADE - Ideal for lead-free OEM battery terminals, marine, and open barrel lugs—trusted by pros.
PRECISION PERFECTED - Wire EDM cutting ensures flawless B-shape crimps every time.
VERSATILE COMPATIBILITY - Designed for AWG 13-3 cables and a wide range of battery lugs from 5A to 100A applications.

The IWISS iCrimp Battery Cable Lug Crimping Tool combines Wire EDM precision jaws with a rugged one-piece steel head and ergonomic long handles to deliver flawless crimps on AWG 13-3 cables and battery terminals rated 5A to 100A. Engineered for durability and comfort, it’s the go-to tool for professionals demanding reliable, labor-saving performance on lead-free OEM and marine battery lugs.

Specifications

ASIN	B07M5WKH5Y
ASIN	B07M5WKH5Y
Best Sellers Rank	#145,588 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #631 in Crimpers
Brand Name	IWISS
Color	Blue
Customer Reviews	4.6 4.6 out of 5 stars (175)
Customer reviews	4.6 4.6 out of 5 stars (175)
Date First Available	4 January 2019
Grip Type	Ergonomic
Handle Material	Alloy Steel
Handle Type	Ergonomic
Is Discontinued By Manufacturer	No
Item Weight	2.8 Pounds
Item model number	IWS-5100A
Manufacturer	IWISS TOOLS
Manufacturer	IWISS TOOLS
Model Number	IWS-5100A
Number of Items	1
Package Dimensions	41.6 x 13.4 x 3.7 cm; 1.27 kg
Size	IWS-5100A(5A-100A)
Specific Uses For Product	Crimping battery cable lugs, open barrel lugs, and lead-free OEM battery terminals
Unit Count	1.0 Count

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