Guarantee: Hello, welcome, you've worked hard! Thank you for choosing our product. If the product has any quality problems within 5 years, please do not hesitate to contact us before making an evaluation. We will give you a full refund. Thank you for your collaboration. We offer convenient 7*24 hour customer service for customers. Purpose: This adapter set is designed to provide a locked extension to your existing tool. Provides extra length to reach a multitude of hard to reach spaces. The spring ball lock ensures a tight fit in the driver's head to prevent slipping during use. Specifically machined to securely fit a handheld screwdriver, drill driver or impact wrench. PACKAGE CONTAINS: 3Pcs: 1/4", 3/8", 1/ 2" each with 1/4" hex key/driver bits for all quick-change drill chuck systems. Turns any electric drill into a conductive power nut Heavy-duty spring-loaded ball bearing holds sockets securely in place. square. Sockets snap firmly and won't slip. Colorful: Easy to choose: Different color-coded rings, clear help quickly choose the right one. Our products belong to the latest updates, the quality is super good. Material: chrome vanadium QUALITY: Manufactured from hardened chrome-vanadium (Cr-V) steel to ensure long life The construction to be compatible with the most powerful impact guns. Usage: Fits comfortably and securely in your drill chuck or hand-held driver. Comprised of your most common bit sizes 1/4", 3/8", and 1/3" change shank sizes Provides versatility and convenience no matter which tool you have chosen to use. Great for DYI, auto repairs, household maintenance, and most general repairs. A good addition to any set of tool boxes.