Adjustable step ladder

A step ladder comprising:

• (a) a plurality of spaced apart stiles, each terminating at a first end in a foot for engaging a stile supporting surface;
• (b) a plurality of spaced apart treads having a first end and a second end, said treads affixed to a stile at each of said first and said second ends;
• (c) a top cap affixed to a second end of said stiles;
• (d) an upper back leg pivotally attached to said top cap;
• (e) a centrally hinged spreader beam pivotally attached to said upper back leg at a first end and to a stile at a second end, said spreader beam foldable about said central hinge to permit said upper back leg to pivot to a position substantially coextensive with said stiles and extendable to secure said upper back leg in a bracing position;
• (f) a lower back leg including a plurality of back feet for engaging a back leg supporting surface, said lower back leg slidably engaging said upper back leg such that a distance from said top cap to said plurality of back feet may be altered to adjust a ladder angle of said stiles relative to said stile supporting surface;
• and
• (g) a back leg lock to selectively secure slidable movement of said lower back leg and said upper back leg.