GK500/GK510/GK515

    Adjustable keeper, 9 mm latch throw, optional latch monitor

    Lock mode:
    Fail-safe (GK500)
    Fail-secure (GK510, GK515)

    Hold-open function: GK515


GK520/GK525

    Adjustable keeper, mechanical unlocking lever,9 mm latch throw

    Lock mode:Fail-secure

    Hold-open function: GK525


GK530/GK540/GK545

    Stainless steel keeper, 13mm latch throw

    Lock mode:
    Fail-safe (GK530)
    Fail-secure (GK540, GK545)

    Hold-open function: GK545