Blind-baking a pie requires you to roll out the dough, fill the pie plate, then bake it unfilled until it is crisp and golden, but the crust will likely slump, bubble, and misbehave in the oven. A common solution to this problem is a pie chain, a string of stainless steel beads you coil in the crust to hold it in place, but there are better choices to weigh down your pie dough.