The fish scale pattern is a machined texture applied to the aluminum handle scales — a raised, overlapping scale pattern that covers the full length of both scales. The texture is anodized into the aluminum rather than added as an overlay material, keeping the handle slim and lightweight while providing positive grip traction in wet or dry conditions. Against the green anodize, the fish scale pattern catches light differently across its surface to create visual depth that a smooth handle cannot produce.

The TR-3 X1 and TR-5 are both Pro-Tech coil-spring push-button automatics with button locks, but differ in size. The TR-3 X1 is the compact version — 8.0 inches overall, 3.5-inch blade, 3.9 oz. The TR-5 is the full-size platform — 7.625 inches closed, 3.25-inch blade, larger handle footprint. The TR-3 X1 is positioned between the slim Godson and the larger TR-5, offering a balance of compact carry size and a usable blade length for tactical and EDC applications.

The TR-3 X1 SW Green uses 154CM stainless steel with a stonewash finish and hollow grind. 154CM is the high-chromium stainless Pro-Tech has trusted across their automatic lineup — reliable edge retention through daily use, good corrosion resistance, and straightforward sharpening on any ceramic or diamond medium. The hollow grind produces a fine, slicing edge geometry along the full blade length. The stonewash finish hides carry wear and eliminates blade glare in field conditions.

The Pro-Tech TR-3 X1 is a push-button automatic knife with a 3.5-inch blade. Automatic knife laws vary significantly by state and locality — some states permit them freely, others restrict by blade length or require permits, and some prohibit them entirely. Knifeworks recommends verifying your local and state laws before purchasing or carrying. A compliance form is required at checkout.

A hollow grind is produced by grinding the blade bevel with a concave wheel, creating a curved, scooped cross-section that is thinner behind the edge than a flat grind of equivalent blade thickness. The result is a very fine, slicing-optimized edge that excels at clean, draw cuts through food, cord, and soft materials. The trade-off is that a hollow grind edge is less robust under lateral stress than a flat grind — it is optimized for cutting performance over impact resistance, which suits the TR-3 X1's EDC and general utility application.

The TR-3 X1 SW Green measures 8.0 inches overall when open with a 3.5-inch blade at 0.125 inches thick. Closed length is 4.5 inches. It weighs 3.9 oz. The tip-up right-hand clip keeps it correctly oriented for a single-motion draw from a front or jacket pocket.