PACKAGE CONTAINS:3Pcs - 1/4" drive adapter, 3/8" drive adapter, and 1/2" drive adapter and each with a 1/4 inch hex shank driver socket wrench adapter set .1/4" 3/8" 1/2" Turns any power drill into a power nut driver Sturdy spring-loaded ball bearing holds sockets securely in place Sockets Snap-On Tightly and Won't Slip Off.USES: Attach these Versatile Extender Bars to any Powered/Cordless Drill Chuck or Impact Driver to turn it into a High-Speed Nut Driver Useful for Automotive Mechanic Vehicle Repairs, Technicians, Handyman & Hobbyist Developments to use with sockets on Hardware/Tire Nuts, Lag Bolts, Hex Head Cap Screws at Home, Workshop Factory or Construction Site.Multifunction: used in the installation of pneumatic screwdriver, electric screwdriver, pneumatic drill, manual screwdriver and other installation for the hexagonal tool .It is a good accessory for conversion.Provides versatility and convenience no matter which tool you chose to use. Great for the , household maintenance, and most general repairs, not for industrial work. A great tool addition to any tool box set.Durability: Quality is a guarantee with this 3 piece sturdy and durable solid steel set designed to withstand torque compression under most standard use situations. The exterior anti-weathering coating provides extra protection from damage against elements and substances such as oil and fluids that may come in contact with the extension bars during use with repairs such as in the automotive field.Design: Shaft quick-change hex design allows easy and quick switching between adapters of different sizes without stripping during high speed operation - Sandblasted surface for optimum durability - Spring loaded extension ball bearings securely attached to sockets , to prevent falling off.Product Description1. Adapts sockets to power drills and drivers2. Detent ball for secure socket retention so sockets snap on tightly and wont slip off3. 1/4-inch hex shank prevents stripping during high speed drill operation4. Super strong heat-treated chrome vanadium steel for normal and impact use5. Sandblasted finish6. Converts all power drills into speedy socket drivers7. Use with a hand screwdriver handle or battery/power tool8. Color coded for easy recognition Size:1/4 * 1/4 * 65mm length -- 1/4 " shank can be converted to 6.35mm square head3/8 * 1/4 * 65mm length -- 1/4 " shank can be converted to 9.4mm square head1/2 * 1/4 * 72mm length -- 1/4 " shank can be converted to 12.6mm