The MagFlip Wallet uses built-in magnets with 3000g of magnetic force — significantly stronger than the industry average of 700g–1200g. Once attached to a MagSafe-compatible case, the wallet stays firmly in place during normal daily use. It will not fall off from walking, bending, or light movement. To remove it, you need to deliberately pull it off. A few customers have noted that some cases don't hold as well. To have the strongest hold, use the wallet with a SUPCASE MagSafe-compatible case (UB Grip, UB Mag, or UB Mag XT).