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 Full Copper Heavy Duty Electrode Clamp Accessories for Welding Machine ARC MMA Welder

Reboot Welding Electrode Holder Twist Type 400AMP Full Copper Heavy Duty Electrode Clamp Accessories for Welding Machine ARC MMA Welder

Product ID: 102066490

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⚡400A Power

🔧Heavy Duty

🔩Screw Type

Description

🔧 Weld with Confidence - Your Ultimate Electrode Holder Awaits!

UNMATCHED POWER - Experience the strength of 400A for all your welding needs.
ERGONOMIC DESIGN - Insulated handle ensures comfort and safety during use.
COMPACT LIGHTWEIGHT - Weighing only 1.12 pounds, it's easy to handle and store.
PRECISION ENGINEERING - Electrode can be bent to any angle, maintaining a secure grip.
VERSATILE COMPATIBILITY - Accepts rods up to 5/16 inch for maximum flexibility.

The RebootWelding Electrode Holder is a robust 400AMP full copper clamp designed for professional welders. With a screw-type mechanism, it accommodates rods up to 5/16 inch and supports electrode thicknesses from 1/16 to 5/32 inch. Its ergonomic, insulated handle ensures comfort, while its lightweight design makes it easy to maneuver. Perfect for both precision and heavy-duty welding tasks.

Specifications

Manufacturer	Reboot
Part Number	400A
Item Weight	1.12 pounds
Package Dimensions	8.98 x 3.35 x 1.69 inches
Item model number	400A
Is Discontinued By Manufacturer	No
Size	400 Amp
Color	Red
Material	Copper
Pattern	400A
Item Package Quantity	1
Batteries Included?	No
Batteries Required?	No

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