All our efforts have so far made us one of the largest international operational tool manufacturers with customers in over 135 countries around the world This build style is far superior in strength and maintenance of exact torque length All SK interchangeable heads are made from a single piece of alloy steel Interchangeability across the full spectrum of torque ranges, Weight: 0.9259415004 pounds, Manufacturer: KS-Tools Werkzeuge-Maschine