Protech Tantilla OTF knife. California Legal OTF knife. The Protech Tantilla automatic OTF knife deploys the blade out the front. The Protech Tantilla is a small California legal knife that is a single action OTF. Blade: 1.9" 154 cm rc 59, Overall: 5.25", Weight: 2oz. Slide safety and pocket clip for tip down carry.