Comprehensive Set: This package includes 12 high-quality stainless steel wire bore brushes, ranging in size from 5/16Inch (8mm) to 1-3/16Inch (30mm). Each size is crafted to meet different cleaning demands, ensuring you have the right tool for cleaning various surfaces and cavities. Universal Compatibility: Equipped with a standard 1/4Inch hex shank, these brushes are designed for easy attachment to any standard driver handle, power drill, or die grinder. This versatility allows for a seamless transition between tools, facilitating efficient and effective cleaning. Versatile Use: Ideal for reaching into narrow holes and confined spaces, these brushes are perfect for removing dust, rust, and . They are also excellent for polishing pipes, ports, and bearings, making them a valuable addition to any maintenance toolkit. Construction: Featuring a -plated shank for superior rust resistance, these brushes are built to last. The stainless steel bristles are arranged in a twisted wire form, enhancing their strength and durability, making them ideal for tackling tough cleaning tasks. Usage Guidelines: To optimal performance and of the brushes, use them in a push-pull motion with a compatible drill or die grinder. Avoid counterclockwise rotation and maintain a speed below 600 rpm to prevent damage to the brush or the being cleaned., Weight: 0.5070632026 pounds, Manufacturer: Bortivier