Master Magnetics RB50NPCX2 Magnetic Hook, Round Base Magnet Fastener with Steel Clip Chrome Plate, 2.04" Diameter, 2.210" Total Height, 35 Pounds, Silver (Pack of 2) Magnet with securely-mounted clip with 1" opening Magnet holds 35 pounds on contact with 1/4" thick, flat, smooth ferrous plate in a vertical test, 50% less on vertical surface holding against sliding force and less on steel with paint Round base magnet fastener made of chrome plated steel cup containing Ceramic, Ferrite magnet with nickel plated steel clip attached