Quick change keyless chucks hold accessories with 1/32 inch to 1/8 inch shank sizes. One-piece structure design, made of alloy material, sturdy and durable, superior to plastic models. The 3-jaw chuck is well-constructed, with a built-in spring for stable and long-lasting performance. Includes eight brass collet sizes: 0.8mm, 1.2mm, 1.5mm, 1.8mm, 2.0mm, 2.4mm, 3.0mm, and 3.2mm. Compatible with all rotary tools and flex shafts. The 3-jaw chuck works with both cordless and corded rotary tools, suitable for use with drill bits, sanding drums, polishing wheels, and other light-duty accessories. Color: Gold + Black Material: Brass Package Contents: 1 set x Drill Chuck Collet Set Note: Only the items listed above are included. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement may vary by +/- 1-3 cm.