Armstrong 12-935A 1/2" Drive Speeder 19" Knurled Handle Unique "Hour Glass" Handle Design Has a Concave Shape Conforming to the Grip of the Hand Which Reduces Fatigue and Improves Comfort Manufactured From High Alloy Steel Using the Most Up-To-Date Manufacturing Process and Heat Treat for Greater Strength and Durability 12-935A has a Knurled Handle Meets or Exceeds ASME B107.10M and US Federal Spec. GGG-W-641E