7 wheel pastry cutter is constructed of stainless steel, making it extremely durable and ensuring that it will last you through repeated usage. Its 7 wheels, each measuring 2 1/8" in diameter, are riveted on an expandable arm. When fully extended, there is approximately 5" of space between each wheel,when collapsed, there is approximately 1/2" of space between each wheel. For safety and precision, the cutting wheels can be locked into place by tightening the wingnut located in the center of the adjustable arm. This 7 wheel cutter is great for cutting pastry dough, or even pizza dough, and is sure to make precise, measured cuts every time.