CS Unitec Cross Peen Engineers’ Hammers are a part of CS Unitec’s Non-Sparking / Non-Magnetic Safety Tool Line. CS Unitec Cross Peen Engineers’ Hammers feature drop forging that ensures a long tool life and are now provided with Nupla handles which are twice as strong as fiberglass and 10 times stronger than wood. CS Unitec Cross Peen Engineers’ Hammers are available in Aluminum Bronze or Copper Beryllium. Cross Peen Engineers’ Hammers are used for forging and riveting in metalwork. With heat and the wedge-shaped end of the hammer you can make the metal fuller. Prop. 65 Warning for California Residents – WARNING: This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.