The patented LeveLok LL-STB-1 Leveler/Stabilizer has only two controls, and operating it is so easy, it can be done with the touch of a toe. To set into position, hold the ladder with both hands and simply push the foot pedal down. The leg will extend in increments of 3/16 of an inch up to 10?. Additionally, the automatic backup safety lock is instantly activated, thereby preventing accidental slipping or tripping of the locking mechanism. This is another unique and patented feature found only on Levelok Ladder Leveling Systems.