Stuck In A House

Riddle: You are locked in a house and you have four objects. You have a wooden chair, a ladder, a piano, and a rubber ax. You can only pick one object and you can't get out by breaking anything. What would you use to get out?

Answer: You use the piano KEYS to ulock the door! Source: https://riddles.com/1237

You are locked in a house and you have four objects. You have a wooden chair, a ladder, a piano, and a rubber ax. You can only pick one object and you can't get out by breaking anything. What would you use to get out? — Stuck in a house by Anonymous Riddle