Expert Quality, manufactured from chrome vanadium steel hardened and tempered with a polished finish. Each ext. bar has a knurled ring for extra grip. Spring - loaded ball bearing for secure socket holding. Expert Quality Contents: 50, 125, 250 and 500mm Allows sockets to be driven at up to 15° off vertical Chrome vanadium steel hardened, tempered, chrome plated and polished Spring-loaded ball bearing for secure socket holding Manufactured and tested generally in accordance with DIN3122 and ISO3315 Specifications More information: Features | Type | Set |  | Product type | Extension bar |  | Drive size | 1/4 " |
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