Hardened tempered chrome-plated and polished. 1/4", 3/8" and 1/2" square drive. Knurled bands. Spring-loaded ball bearing. 1/4" contains 50, 75 and 150mm extension bars. 3/8” and 1/2" contain 75, 150 and 250mm extension bars.
Hardened tempered chrome-plated & polished
Knurled bands
Spring-loaded ball bearing