Protech Emerson Automatic Knives. The Protech EMERSON is a Protech tactical knife icon made in collaboration with Ernest Emerson. We are proud to carry the full line of The Pro-tech / Emerson CQC7 AUTO . Ernest Emerson has been building knives in 1979 and has earned a reputation for making the most sought after tactical knife designers on the planet. The CQC7 is possibly the most famous of his designs and the Pro-Tech coil spring fired version is made to the exact standards that Emerson is known for. The Emerson / Pro-Tech CQC7 won the Best Collaboration Award by the PKA (Professional Knife Maker's Association) Overall Open Length: 7.85" Handle: 4.625" Blade: 3.25"