Tool Sockets features: This item is a set 4-piece impact socket adapter and reducer. These tools adapt to the situation on the fly to get it done. They create replacements for lost or broken sockets, expand incomplete socket sets, and allows greater flexibility for all sockets and drive tools. Features Color: Black Material: Metal Size: 3.50X2.47X2.47cm/1.38X0.97X0.97 inch This impact socket adapter and reducer is perfect for air tools, hand tools, impact tools Impact sockets efficiently transfer torque from impact wrench to fastener, loosening the most stubborn nuts and bolts Made of high strength metal with black industrial finish. Whole quenching heat treatment, durable high hardness Specific impact grade socket adapter made exclusively for power drivers and wrenches, spring-loaded detent ball can firmly lock the adapter into socket avoiding dropping in high-speeds rotation, safely and steadily Fine workmanshlp and creative appearance ensure its popularity and practicality.