[Package Included]: 30PCS 1/4inch hex shank keyless drill chuck, include 10x 0.3mm-3.6mm drill chuck, and 20x 0.3mmx6.5mm dill chucks. Easy to use and install, fast, convenient and safe, it is an essential power tool accessory in daily life. [Quik Change Adapter Converter]: Keyless design allows one to easily and quickly swap bits and wires, easy to load and unload. Can quickly switch tasks and maintain work progress, which simplified all your tasks. Hexadecimal drive power tools are allowed to be applied with most drill bits. [Strict Quality Control]: Our mini adaptor drill chuck manufactured under strict quality control. Made of high qualitity metal meterial. Durable, well-made, they are good enough for most jobs. Small size and light weight, will not bring additional burden to the operation. [Keyless Drill Chucks Design]: Keyless drill chucks can easily turn a cordless electric screwdriver into a drill or grinder; Can be easily to adjusted to quickly switch tasks and maintain work progress. They are essential power tool accessories. [Wide usage]: These drill chucks' specifications are 0.3mm-3.6mm/0.3mm-6.5mm, which suitable for most drills and cordless power screwdrivers. For repairers, model makers, DIY enthusiasts,It is an perfect tool to use in garages, warehouses, offices, houses and other places. Colour: Black + silver Material: steel Package Contents: 30 x Keyless Drill Chuck Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.