The knife designed by Blackie Collins from 1975 called the Rolox. Benchmark was producing the Rolox knife up until the company was purchased by Gerber in the early 90's." Benchmark made three sizes: the Diamondback (the largest, blade 3", OAL: 7-3/8"), the Viper (medium, blade 2-5/8", OAL: 6-1/2" and the Sidewinder (the smallest, blade 2", OAL: 5").  

This one is a medium sized knife, measuring 6-1/2 inches open, 3- 7/8 inches closed. The blade is 2-5/8 inches long, 1 inch wide, and 1/8 inch thick."

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