The OTF automatic that started it all for Microtech Knives, A longtime staple in the Microtech O.T.F. lineup. The Microtech H.A.L.O. (high altitude, low opening) is known for its lightning-fast blade deployment. This single action O.T.F. fires with the touch of a button and will retract by pulling the charging handle. The unique shape and slender design of the 6061-T6 handle allows for easy conceal carry. Overall length is 10.6" and the blade measures 4.4".