OTFs. Microtech is known for its bold Out The Front knives, starting with the legendary HALO in 1995 and the Ultratech in 1999. Over the last few years, the Dirac, Dirac Delta, and Exocet hit the shelves. 2021 brought the Scarab II into our core product line. 2022 saw the introduction of the GLYKON. Sort by.