This is a good quality, well made and robust Flexshaft with a price accessible to all users. It can be used for used for drilling, grinding, sanding cleaning, polishing in many different areas like jewelry Making, Wood Working, Model Making, etc. Used in tasks like polishing, grinding, cutting, texturing, drilling, carving, wax work, stone setting and more. The sheath that houses the flexible shaft is spring reinforced at both ends for enhanced durability. Shaft connection accepts all American-style (QD) handpieces. Chucking capacity of the Jacobs-style chuck is 5/32." Maximum speed is 22,000 rpm.