12pc Wobble Extension Bar Set From Britool Hallmark

Allows sockets to be driven with up to a 10° offset from the shaft axis.
Each bar has a spring-ball socket retainer for holding the socket on securely.
Contains sizes: 1/4" drive: 50mm, 75mm, 100mm, 200mm
3/8" drive: 50mm, 125mm, 150mm, 250mm
1/2" drive: 75mm, 150mm, 200mm, 300mm