Nice stool. Leather is beautiful. Easy to put together. You don’t need tools they include wrench. 
Pay attention to various screws as you go along and make sure the bottom round foot rest piece is inserted so that screw holes do not show. 
It’s a big help not to fully tighten legs until you insert and align foot rest piece. 
The stool is balanced perfectly and heavy enough not to easily tip over. 
The swivel bracket is very tight and takes some strength to move into install position.