The abus granit 59 extreme d lock this is probably the toughest d lock money can buy and is suitable for any high risk application a 16mm square section parabolic shackle is double bolted into the twin powercells of the armoured hardened steel body providing colossal pulling resistance the latest generation x plus key mechanism offers 1 000 000 key variations to shrug off any attempts at picking the granit extreme 59 is the absolute business abus granit 59 extreme d lock features