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.
The bolt is securely held by a spring-mounted magnet. This also ensures that the bolt head is fully engaged. The spring allows nuts / bolts to be easily removed after they have been unscrewed.
Chrome molybdenum steel, surface burnished.