Specifications: This durable flexible shaft is quick to connect and easy to operate, making it a great addition for your rotary tool. The ergonomic handle is non-slip and comfortable to grip, ensuring high efficiency and stable performance. It is suitable for dust removal, fine carving, grinding, polishing, sanding, and more. Black Model: Item Name: M19*2 Thread Flexible Shaft Material: Alloy, Steel Screw Interface: M19*2 Applicable Electric Grinder: for 17.5mm Thread Outer Diameter Electric Grinder Feature: Sturdy, Durable, Wide Application, Simple Installation Handle Size: 0.3mm - 3.2mm / 0.01" - 0.13" (Approx.) Total Length: 1m / 39.37" (Approx.) White Model: Item Name: 6mm Chuck Flexible Shaft Material: Alloy, Steel Applicable Electric Grinder: for 6mm Shank Diameter Electric Grinder Feature: Lightweight, Convenient, Easy to Use, Perfect Accessory Handle Size: 110mm x 20mm / 4.33" x 0.79" (Approx.) Chuck Clamping Range: 0.3mm - 3.2mm / 0.01" - 0.13" (Approx.) Chuck Thread: 8mm x 0.75mm / 0.31" x 0.03" (Approx.) Total Length: 1m / 39.37" (Approx.) Notes: This product is not intended for high-strength grinding or polishing. The blade diameter must not exceed 8mm, and the tool should be operated at the lowest speed setting. Due to differences in lighting and screen settings, the item's color may vary slightly from the images. Slight dimensional variations may occur due to manual measurement. Package Includes: 1 x Flexible Shaft (Other items not included)