Those were the models they made after discontinuing the 1034, 1032, 1031, 1029, ETC. with the phenolic handles. They were made very late 90's and very early 2000's then they switchted to no bolster. The 2010 was AUS6A steel, 6 1/4 in. blade 11 1/8 inches overall. The 1010 was the same knife with no bolsters. The 2010 was called Roughneck and there were a couple other models in the series, Elk skinner for one Model #2014