The BTKT2204C Tonic is a compact 4-inch folding knife built for serious users who demand edge retention and corrosion resistance. The 2.88-inch M390 blade delivers exceptional hardness and wear resistance, while the green canvas micarta handle and titanium bolster provide a durable, refined grip that ages well. The inset ball backlock ensures reliable blade security, and the thumb stud allows quick one-handed deployment. At this size and spec level, it's equally at home in a toolbelt, kitchen drawer, or as a refined EDC piece across Europe.

4" (10.16cm) closed. 2.88" (7.32cm) satin finish Bohler M390 stainless blade. Green canvas micarta handle. Titanium bolster(s). Thumb stud. Pocket clip. Black nylon zippered storage case. Boxed.