CMS Magnetics Ceramic Magnets Dia 5/8" x 1/8" Disc - Grade 8 Hard Ferrite Magnets - Crafts, Science and Hobbies - Package of 100 Effective: Fair Strength and Stronger than Grade 5! Surface Gauss 1,550. Each Piece Provides 0.6 LB Holding Force with a Direct Touch and Direct Pull on a Steel Surface Economical: Costing Just a Fraction of the Cost of the Similar Size of Rare Earth Magnets, Ceramic Magnets Are the Economical Choice. Applications: Science Educations and Kids' Science Projects, Crafting, Light Duty Holding Jobs in Backyard or Garage. Holding Assemblies and Tools. Durable: Ceramic Magnets will not Rust Under Any Conditions. They Can be used in Fresh or Salt Water. Magnetism will Last Forever for Normal Use Best Quality and 30 Days Money Back Guarantee: The Best Ceramic Magnets Made under ISO 9001 Quality Systems! We will Refund Every Penny or Replace if There are any Quality Issues