can this fit a 10mm (3/8in) electrode?

I cant say for sure but I seriously doubt you want to run rods that large with it anyway. I imagine your rod would slip out of the grooves while welding since the grooves are more suited to 3/16 rods. Probably want to go for the 500A for large rods like 3/8! I have never used any that large

Will this works on lincoln ac225 stick welder? what is 500 amps mean? there are 300, and 200 amps, what are the differences?

Our will work, i put one on my welder. I couldn't use the little piece of copper sheet to wrap the cable though, I'm not patient enough. 500 amps is the maximum amps that it can handle.

What is the small copper piece that is in the shape of a V for the holder for?

If you have smaller wire sizes you need to insert it into the same place that your wire goes before tighten the set screw

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Reboot Welding Electrode Holder Twist Type 400AMP

Reboot Welding Electrode Holder Twist Type 400AMP

Product ID: 102066490

⚡400A heavy-duty current capacity

🔩Twist-type clamp for secure electrode grip

🛠️Full copper for superior conductivity

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Description

⚡ Twist, Lock, Weld: Power Meets Precision in Every Spark!

PURE COPPER CORE - Ensures maximum electrical conductivity and durability under heavy use.
TWIST TO LOCK DESIGN - No springs to fail—securely grips electrodes with a simple twist for reliable performance.
FITS A RANGE OF ELECTRODES - Compatible with rods from 1.6 to 4.0 mm thickness, adapting to your welding needs.
ERGONOMIC INSULATED HANDLES - Comfort and safety combined for long hours on the job without fatigue.
POWER THROUGH WITH 400 AMPS - Handles high current loads effortlessly for professional-grade welding.

The Reboot Welding Electrode Holder is a robust 400AMP clamp crafted from full copper for optimal conductivity and durability. Featuring a twist-type mechanism, it securely holds electrodes ranging from 1.6 to 4.0 mm thickness without the risk of spring failure. Designed with insulated handles for safety and comfort, this heavy-duty accessory is ideal for ARC and MMA welding professionals seeking reliable, high-performance tools.

Specifications

ASIN	B07M86W7QM
Batteries Included?	No
Batteries Required?	No
Best Sellers Rank	#15,333 in Automotive ( See Top 100 in Automotive ) #4 in Arc Welding Electrode Holders
Color	Red
Customer Reviews	4.4 4.4 out of 5 stars (1,559)
Date First Available	October 29, 2018
Is Discontinued By Manufacturer	No
Item Package Quantity	1
Item Weight	1.12 pounds
Item model number	400A
Manufacturer	Reboot
Material	Copper
Package Dimensions	8.98 x 3.35 x 1.69 inches
Part Number	400A
Pattern	400A
Size	400 Amp

Reviews

M**R

5.02.2025

D**O

21.07.2025

D**C

3.05.2019

S**S

29.03.2026

D**N

5.03.2026

P**N

7.11.2025

O**N

13.02.2020

M**O

14.11.2019

S**N

20.01.2021

A**R

2.03.2021

A**K

23.09.2019

D**Y

4.03.2021

N**S

27.02.2021

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In stock

Sold byAmazon PhilippinesDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Philippines.

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