This great value Set includes 11 x 38mm Twist Lock Cutting Discs, Twist Lock Mandrel and a Carry Case for easy storage and transport. The Twist Lock Cutting Discs have a thin 38mm design to remove less material and produce faster cuts. They’re great for cutting through stubborn bolts, screws and nails. These Cutting Discs are also ideal for shaping and trimming larger metal and PVC plastic components. They have a 38mm diameter, which creates a high velocity at the cutting edge for enhanced cutting speeds, rotating at up to 35, 000rpm. The Twist Lock Mandrel attaches securely to the Cutting Discs with its own twist lock system. Its design also enables tool-free changeovers. The Twist Lock Mandrel’s 3.2mm diameter shank is compatible with RYOBI and many other brands of rotary tools. Conveniently store the Twist Lock Cutting Discs and Twist Lock Mandrel in the Carry Case. It closes with a snap lock to keep accessories secure. Its case bit holders can be removed for mobile storage. A stand-up feature makes it easy to store this Carry Case upright in toolboxes and tubs.