Features:* High-quality material, durable and sturdy construction for long use and stable operation.* Unique patented locking function, breaking the traditional locking methods.* After ratcheting, locking components mounted on the rear sleeve, locking circumferential length, more effective in preventing loose removal, the collet is more reliable when gripping means.* Good metal with texture, comfortable sweatshirt.* Torque thrust bearing unique easy the exerted shank translates into a higher clamping force.* Range: suitable for 1050W more power hammer drill. Specifications:* Material: Metal, Plastic * Color: Black * Mounting Range: 0.8-10mm/0.031"-0.39" * Mounting: 3/8-24UNF * Socket Connecting Rod: 1/2" Square Socket Adapter * Quantity: 4pcsPackage Included:1 * Drill Chuck1 * SDS Plus Shaft1*1/4" Hex Chuck Adapter1*1/2" Square Converter with ScrewNote:1. The actual colors of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2. Please allow slight manual measurement deviation for the data.