Revolving Turret Guide: Easily switch between six (6) common drill bit sizes: 3/16", 1/4", 5/16", 3/8", 7/16", and 1/2" diameter bits. Accurate Joinery: Ensures precise center-drilling every time, allowing you to create perfectly round dowels and strong joints. Durable Construction: Made from robust zinc alloy and other quality materials built to last. Capacity: Designed for material up to a 4-inch capacity. Vintage Original: This is a genuine Sears Craftsman tool, adding to its collectible value. Includes: The original box is included (note: the box may show signs of wear consistent with age, as seen in photos).