The Central Bore Gauge #6460 is a precision measuring tool designed for automotive use. With a range of 2 1/2 through 7 inches, this set includes the necessary components to accurately measure bore sizes. Manufactured by Central in the United States, this gauge is a reliable tool for professionals and automotive enthusiasts looking to ensure precise measurements for their vehicles. While it does not come with a warranty, the Central Bore Gauge #6460 offers a high level of accuracy and quality for all your automotive measuring needs**** NOTE PLASTIC BOX HAS ONE BROKEN HINGE STILL CLOSES FINE AND LOCKS****