Product Code: 16766 With wobble end, manufactured from chrome vanadium steel hardened and tempered with a micro satin finish. Each extention bar has a knurled ring for extra grip. Attached with a spring-loaded ball bearing for secure socket holding machined wobble end allows socket to be driven at up to 15° to the vertical. 4 x Extension bars: 50, 100, 150, 250mm. Manufactured and tested generally in accordance with DIN3122 and ISO3315 Specifications