Version:
Sturdy shape especially for use with electric or compressed air impact wrenches. With cross hole and snap ring groove for securing sockets. Internal square to DIN 3121.
For safety reasons must always be secured using a suitable locking pin and O-ring.
Advantage:
Direct access for bolt tightening where access is difficult, no universal joint required.
Standard:
DIN 3129
Material:
Chrome molybdenum steel, surface burnished.