Can you use this magnet to guide a metal plumbob inside a wall to a predrilled hole for fishing electrical wire from basement to attic?

If any metal in the wall it will stick to it. This is a very strong magnet and you may lose it in the wall if you use a cheap string...

Are you supposed to add thread locker?

If on fishing line you should not need to. I don't know why you would need to remove the ring from the magnet housing, but you could add some thread-lock.

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DIYMAG Strong Neodymium Fishing Magnets, 300 lbs(136 KG) Pulling Rare Earth Magnet High Power with Handle Diameter 1.97 inch(50mm) for Retrieving in River and Magnetic Fishing

DIYMAG Strong Neodymium Fishing Magnets, 300 lbs(136 KG) Pulling Rare Earth Magnet High Power with Handle Diameter 1.97 inch(50mm) for Retrieving in River and Magnetic Fishing

Product ID: 585641386

Details

Brand
DIYMAG
Colour
Silver
Material
Neodymium
Product dimensions
50L x 50W x
Shape
Round

🎯50mm diameter precision steel base

🧲300 lbs (136 kg) pull force

🛡️Triple-layer Ni+Cu+Ni rust-resistant coating

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VT10456

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Description

🧲 Reel in the impossible — magnetism that commands attention!

BUILT TO LAST - Triple-layer coating ensures rust-free, scratch-resistant, maintenance-free durability.
UNMATCHED MAGNETIC POWER - 300 lbs of pulling force lets you recover treasures others miss.
PRECISION ENGINEERED BASE - 50mm steel base focuses magnetic force for maximum retrieval efficiency.
VERSATILE MAGNET FOR PROS - Perfect for fishing, lifting, suspending, and industrial recovery tasks.
PERMANENT STRENGTH GUARANTEED - Rare earth neodymium magnet retains full power for decades.

DIYMAG Strong Neodymium Fishing Magnet delivers a powerful 300 lbs (136 kg) pull force with a precision 50mm steel base. Its triple-layer Ni+Cu+Ni coating guarantees rust resistance and durability, making it ideal for magnetic fishing, industrial lifting, and recovery. Designed for professionals and enthusiasts alike, this rare earth magnet maintains permanent strength for decades, ensuring reliable performance in every adventure.

Specifications

ASIN	B0BDFJWGWY
Best Sellers Rank	#106,961 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #167 in Industrial Magnets
Brand Name	DIYMAG
Color	Silver
Customer Reviews	4.3 4.3 out of 5 stars (2,166)
Included Components	no
Item Dimensions L x W x Thickness	50L x 50W x 52Th millimeters
Item Thickness	2 Inches
Item Weight	0.18 Kilograms
Manufacturer	DIYMAG
Material Type	Neodymium
Number of Pieces	1
Part Number	NCN50-1P
Pull Force	300 Pounds
Shape	Round
Unit Count	1.0 Count

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VT10456

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In stock

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

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