-The spring ball lock ensures a tight fit into the driver head to prevent slipping during use of impact socket extension set -Specifically machined impact socket adapter to fit securely into a hand held driver, drill driver or impact wrench -Impact socket adapter set is good accessory for conversion -These impact socket adapters are made of heavy duty construction to ensure a long lifetime through tough torque jobs without breaking or rusting -The package includes 1pc 1/4 impact socket adapter, 1pc 3/8 impact socket adapter, 1pc 1/2 impact socket adapter Description This 3 piece impact socket extension set is designed to meet a variety of needs. Fits snugly and securely in your drill chuck or hand held driver. Great for the DIY, household maintenance, and most general repairs, not for industrial work. A great tool addition to any tool box set. Features -Color: Yellow, Red, Blue. -Material: High Carbon Steel. -Size 1/4": 65mm/2.56inch, 1/4" shank can be converted to 6.35mm square head. -Size 3/8": 65.8mm/2.59inch, 1/4" shank can be converted to 9.4mm square head. -Size 1/2": 68mm/2.68inch, 1/4" shank can be converted to 12.6mm square head. -Impact socket adapter is made of high carbon steel, avoid broken during the usage -This impact socket adapter set is designed to provide a securely locked in extension to your existing tool. Provides additional length to reach into a multitude of hard to reach spaces -Multifunctional impact socket adapters are used in the installation of pneumatic screwdriver, electric screwdriver, pneumatic drill, manual screwdriver and other installation for the hexagonal tool -Consisting of your most common bit sizes 1/4", 3/8", and 1/2" changing shank sizes. Provides versatility and convenience no matter which impact socket adapter you chose to use -Different color coded rings on the impact socket adapters, make you easy to pick the right one Package Including 1 * 1/4" Hex shank to 1/4" socket Socket Adapter 1 * 1/4" Hex shank to 3/8" socket Socket Adapter 1 * 1/4" Hex shank to 1/2" socket Socket Adapter