This item is manufactured with premium material for durable and long lasting use. Unique design adjusts to most size or shape, compact and easy to carry. It can be used in automotive industry, household maintenance, manufacturing industry, construction. Be a good helper in your work and life. Feature - Color: As shown - Material: Alloy Steel - Size: Approx.50mm/ 2.0inch(Length) - Easy to use: This 3 piece driver extension bar set is designed to meet a variety of needs. - 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. - Design: The shaft quick change hex design allows to switch easy and fast between the different size adapters without stripping at high operations - Easy to Choose: Different size coded rings make it easy to pick the right one.