Roetin Headers are: thinner, sharper, better penetrators, more rigid, lighter weight and tougher. The stud head has the exclusive obround head design and a 3/16 hex socket in the back to hold it while installing or removing it. Constructed of the same high strength materials as the Black Daggers. The large 7/8 dia. obround head with 1/4 -28 threads provides better traction rigidity.