Trimec Electromagnetic Locking/Maglocks A door can be kept closed using the holding force of a low-voltage magnet. Trimec's line of electro magnets is suited for high-traffic applications as well as for easy installation on glass doors. Trimec Z Series Double Monitored Electromagnetic LocksHolding forces from 500kg to 1160kg. Trimec Z Series Double Non Monitored Electromagnetic LocksHolding forces from 500kg to 1160kg. Trimec Z Series Recessed Electromagnetic LocksHolding forces up to 280kg. Trimec Z Series Single Monitored Electromagnetic LocksHolding forces from 250kg to 580kg. Trimec Z Series Single Non Monitored Electromagnetic LocksHolding forces from 250kg up to 580kg. Trimec Electromagnetic Lock AccessoriesArmature Plate and Brackets.