Will one of these hold a knife to a wall ?

Depends on how heavy the knife is I use them in my van to hang things from the ceiling they work fine for that

Could these be used to hold a wood valance to a painted steel mini blind header?

Yes, I purchased these for that same reason. The ones that came with my own were not strong enough. I used 3 on a 60in window.

Do you see these without the plate?

Hello- we do sell the magnet outside of the chrome cup, however we don't sell them on Amazon. Please contact our customer service line at 866.867.0941 for assistance. For your convenience, reference product #CR175, as it is the product that most closely resembles the magnet inside the product in question. Thank you!

How to install on plastic boat

Certainly won’t adhere to plastic. Maybe you could epoxy steel plates around the boat. These magnets are pretty strong and would adhere to the plates.

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Master Magnetics Ceramic Round Base Magnet Pack - Heavy-Duty Strong Magnets - 35 lb Pull Each - for Indoor and Outdoor Use - Chrome-Plated - 2.04" Diameter - 0.197" Hole - 0.302" Thick - 6-Pack

Master Magnetics Ceramic Round Base Magnet Pack - Heavy-Duty Strong Magnets - 35 lb Pull Each - for Indoor and Outdoor Use - Chrome-Plated - 2.04" Diameter - 0.197" Hole - 0.302" Thick - 6-Pack

Product ID: 290999476

Details

Material
Ferrite Low
Brand
Master
Product dimensions
5.2L x 5.2W x
Colour
Charcoal Gray
Shape
Round

💪35 lb pull strength

🌡️Withstands up to 400°F

🛠️0.197" center hole for versatile mounting

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€ 36.81

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Sold byAmazon SpainDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🧲 Power your projects with magnetic mastery!

TRUSTED SINCE 1976 - Master Magnetics delivers proven strength and quality for professionals and DIYers alike.
UNMATCHED HOLDING POWER - Secure heavy items effortlessly with 35 lbs of magnetic pull per magnet.
VERSATILE MOUNTING OPTIONS - 0.197" center hole lets you pair magnets with hooks, knobs, or eyebolts for custom setups.
BUILT TO BRAVE THE ELEMENTS - Nickel-plated ceramic magnets resist corrosion and endure temperatures up to 400°F.
PRECISION ENGINEERED FOR RELIABILITY - Crafted with high-grade ferrite, sintered at 2,000°F, and diamond-ground for consistent performance.

Master Magnetics Ceramic Round Base Magnets offer heavy-duty 35 lb pull strength in a durable, corrosion-resistant nickel-plated ceramic design. Featuring a 0.197" center hole for versatile mounting, these precision-engineered magnets withstand temperatures up to 400°F, making them perfect for indoor and outdoor professional or home use. Trusted since 1976, this 6-pack combines strength, reliability, and adaptability for all your magnetic fastening needs.

Specifications

ASIN	B00IYFNXR0
Best Sellers Rank	45,165 in Business, Industry & Science ( See Top 100 in Business, Industry & Science ) 346 in Rare Earth Magnets
Brand	Master Magnetics
Colour	Charcoal Gray
Country Of Origin	China
Customer Reviews	4.6 out of 5 stars 682 Reviews
Global Trade Identification Number	00095421006755, 10095421006752
Item Dimensions L x W x Thickness	5.2L x 5.2W x 0.8Th centimetres
Item Shape	Round
Item Thickness	0.3 Inches
Item Weight	0.01 Ounces
Item thickness	0.3 Inches
Manufacturer	Master Magnetics, Inc.
Manufacturer Part Number	RB50CX6
Material	Ferrite , Low carbon steel
Material Type	Ferrite, Low carbon steel
Model Number	RB50CX6
Number of Pieces	6
Product dimensions	5.2L x 5.2W x 0.8Th centimetres
Pull Force	35 Pounds
Shape	Round
UPC	095421006755
Unit Count	5.0 count

Reviews

D**O

Stick like a magnet

Great used to hold a welding stand very strong nice pack ideal

7.05.2024

T**I

تماسك من جه واحده

التماسك فقط من الجه واحد

6.10.2025

C**O

Muy fuertes

Los uso para levantar laminas desde el suelo con una agarradera, han funcionado perfectamente, tomen en cuenta que el iman es solo fuerte de un lado.

5.08.2019

J**M

Magnets.

Worked great for the project I was doing

12.03.2026

R**Z

Bueno

Bien

5.02.2026

B**B

Works great, strong hold

Used on machine door. Nice strong hold

13.04.2026

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