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

Product ID: 585641386

Details

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

🧲300 lbs pull force

⚙️50mm diameter heavy-duty steel base

🛡️Triple-layer rust-resistant coating

131.42 DT

Duties & taxes included

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Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🧲 Reel in the impossible — magnetism that never quits!

BUILT TO LAST - Triple Ni+Cu+Ni coating ensures rust-free, scratch-resistant durability
PRECISION DESIGN - Magnetic force focused solely on the base for targeted, efficient pulls
VERSATILE UTILITY - Perfect for fishing, lifting, suspension, and industrial recovery tasks
PERMANENT MAGNETISM - Rare earth neodymium core guarantees lasting strength for decades
UNMATCHED MAGNETIC POWER - 300 lbs (136 kg) pull force for maximum retrieval reach

DIYMAG Strong Neodymium Fishing Magnet delivers a powerful 300 lbs pull force with a precision-engineered 50mm steel base. Featuring a triple-layer Ni+Cu+Ni coating, it resists rust and scratches, ensuring long-lasting performance. Designed for magnetic fishing, lifting, and recovery, this rare earth magnet maintains permanent strength for decades, making it a must-have tool for professionals and hobbyists alike.

Specifications

ASIN	B0BDFJWGWY
Best Sellers Rank	#19,915 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #46 in Industrial Magnets
Brand Name	DIYMAG
Color	Silver
Customer Reviews	4.3 4.3 out of 5 stars (2,457)
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 Items	1
Number of Pieces	1
Part Number	NCN50-1P
Pull Force	300 Pounds
Shape	Round
Unit Count	1.0 Count

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131.42 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered 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 Tunisia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

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Perfect platform for hard-to-find items. Delivery was prompt.

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