STEP LADDER
If you wanna work on ground that's not level, whether that's sloping ground or staircase, you can literally take this ladder right up the stairs with you as you go. Ideal!

90 DEGREE LADDER

When you wanna get close to a window or a wall, normal ladders higher go up, the further from the wall or window you get. But with this ladder, you can get right next to the tight corner. All you need to do is to bring one side down, making it into a 90 degree ladder. Easy!

 
Folded Size: 24.8 x 38.2 x 55.9 in
A-Frame Length Range: 4.6 - 7.2 ft