EMGK Stainless Steel. The Gatemaster EMGK gate maglock system is a stainless steel maglock with a 545kg holding force and is for external use. Supplied complete with attachment plates with integral pull handles, it is made of stainless steel and includes all necessary fixings.. 545kg holding force. Switch provides a locked/unlocked signal. Complete with powder coated attachment plates, pull handles and fixings. Easy to fit