TSPROF K4 BLACKWING USA Limited Edition Sharpening Kit

TSPROF K4 2026 is the most sophisticated and thought-out knife sharpening system in the lineup, which combines advanced technology with unrivaled precision. 🎁 TSPROF Knife Sharpening Course This kit comes with a $100 free lifetime access to TSPROF Professional Knife Sharpening Course. TSPROF is more than a manufacturer. For over 15 years, we have studied edge geometry, steel behavior, and abrasive performance at an engineering level. This course brings it all together in 23 lessons, taking you from hesitation to confidence, and from basic skills to sharpening knives at a professional level. K4 BLACKWING USA Edition Some machines become icons long after they leave the sky. There was a time when American aircraft were designed with almost brutal clarity: every lever had a purpose, every surface served the machine, and every marking meant something. No decoration without function. No complexity without reason. That spirit became the inspiration for BLACKWING, the USA Edition of the TSPROF K4. Its deep navy and matte black surfaces recall the machines of American naval aviation — aircraft built to operate from steel decks, surrounded by salt, wind, fuel, and machinery. White technical graphics and precision engravings give the K4 the character of equipment rather than decoration. Look closer and the resemblance becomes less about appearance and more about philosophy. The K4 is built around control. The K4 Blackwing USA Edition body parts are machined from aircraft-grade aluminum and finished in matte black & navy blue anodizing. This choice goes beyond aesthetics and directly improves the system’s durability and protection from corrosion and minor mechanical damage, increases environmental exposure resistance, and keeps its color over time. Navy blue navy components break up the silhouette, while engraved markings give every K4 Blackwing its visual identity. The result isn't simply a TSPROF K4 in another color. It is a different character entirely. A machine built for one mission: superiority in precision knife sharpening. 🎁 TSPROF Knife Sharpening Course This kit comes with a $100 free lifetime access to TSPROF Professional Knife Sharpening Course. TSPROF is more than a manufacturer. For over 15 years, we have studied edge geometry, steel behavior, and abrasive performance at an engineering level. This course brings it all together in 23 lessons, taking you from hesitation to confidence, and from basic skills to sharpening knives at a professional level. Carrying case & EVA insert The TSPROF impact-resistant case is a versatile accessory designed for convenient storage and safe transport of TSPROF K4 sharpening system, with dedicated compartments for all essential sharpening accessories. The case is made of high-strength plastic (polyurethane) and features secure latches, a rubber seal along the inner perimeter of the lid for airtight protection, and a pressure relief valve for equalized internal pressure. The valve under the handle allows the case to be fully sealed from the external environment when closed, and to equalize pressure during air transport when open. The protective case weighs 4.2 kg and is rated IP67 for water and dust resistance. Swiveling mechanism The insides of the unit have been completely redesigned. The new design provides greater rigidity in holding the horizontal position of the frame and allows only 0.1° of arm deflection at a force of 30N.  A screw at the back of the turning mechanism allows you to adjust the force required to flip the clamping arm.  The ability to fully lock the flip will be useful during reprofiling of the knife when it is subjected to heavy loads and vibrations, as well as when sharpening particularly long blades, when you need additional protection against accidental flipping. Three-stage angle adjustment The K4 rack and pinion height adjuster allows easy, fast, and precise setting of the sharpening angle.  Locking of moving elements of the unit can be done with one hand and ensures reliable locking in the desired position.  The new angle setting mechanism has three adjustment levels:  - rough adjustment (accuracy up to 1°) with an extendable slider; - fine adjustment (up to 0.1°) with a rack and pinion mechanism; - ultra-fine adjustment (up to 0.01°) with the micro-adjustment unit. The micro-adjustment unit allows you to change the angle with maximum precision, which is particularly useful for deburring and working with the finest abrasives. The arrangement of the sharpening system parts allows you to set the sharpening angle in the range from 9° to 39.5° per side, for knives up to 430 mm in length. Thickness compensator The height adjuster is equipped with a removable stone thickness compensator. It provides a quick adjustment of the angle during stone change. Abrasive holder A brand new method of mounting the stroke limiters and the coupling on the rod provides increased mounting security and ensures immobility of the elements during operation. Instead of point locking with a screw, the mechanism now uses surface locking through cylindrical sleeves with holes. This reduces the force required to secure the elements and eliminates the possibility of the rod surface damage. The front abrasive stop provides convenient abrasive mounting. It features a spring-loaded ball screw, which prevents free rotation of the stop on the rod and ensures smooth running. The hinge unit incorporates a stainless steel-brass sliding pair for smooth rod travel during use. Rod parking The K4 carries over the stroke limiter and L-shaped piece from the K03, while introducing an upgraded parking system. With subtle refinements to the kinematic scheme, it delivers greater ease of use. New detachable Axicube Shift Now Axicube Shift sits on the far abrasive stop. It can be quickly and easily removed to reduce abrasive weight during sharpening and for easy charging away from the sharpening system. Far and close abrasive stops' positions are interchangeable. The new mounting, featuring a special rail in combination with a locking screw and a magnet, provides an easy and secure attachment of the angle finder. Axicube Shift shows the current sharpening angle with an accuracy of 0.1° and helpts helps to control the sharpening angle in real time and track angle changes, for example, when changing the abrasive. The bright display makes it easy to understand the readings in any light. The angle finder has a durable aircraft aluminum housing and is resistant to vibrations. The Axicube Shift has a removable Li-pol battery and charges via a USB - USB Type-C connector. When the battery is low, the device displays “Lo.” upon startup. Charging takes 15–20 minutes at up to 0.5 A and 5 V. Quick USA clamps This limited USA edition kit features special engraving of the quick-release levers. The Quick clamps securely hold knives up to 7 mm thick. They provide a fast and tool-free usage and a 300 N clamping force. Designed with finite element analysis, the clamps' structure evenly distributes stress for uniform jaw closure. Removable clamping arm Fancy a microscope edge inspection? The new removable design of the clamping arm will become your favorite feature of the K4. No need to take the knife out of the clamps or try and repeat its position and set the same sharpening angle anymore. Rigid body and stable base The fresh design of the leg enhances the portability of the sharpener and allows you to carry it easily with one hand. It attaches to the milled base with three rigid quick-release screws. Thanks to its shape, weight, and wide, slim shock absorbers, the system remains stable during sharpening. Abrasives Included Diamond-coated plates provide intensive metal removal and can be used for a cutting edge with significant damage (chips, bends, etc.).  Use dry, without water or oil. Includes the following grit range: — F150 Extra Coarse - for profiling, and shaping the edge. — F220 Coarse - reducing sharpening scratches. — F400 Medium - reducing sharpening scratches, biting edge. — F600 Fine - pre-finishing, biting edge. — F1000 Very Fine - finishing, deburring, gives mirror polish for some steels. This K4 USA Edition Bundle Includes TSPROF К4 2026 body with integrated base TSPROF abrasive holder with Axicube Shift TSPROF Quick clamps, black - 2 pcs. Set of five diamond coated plates Professional Sharpening Course - lifetime access. Spare parts Packaging: TSPROF Protective Case, EVA insert  Specifications: Sharpening angle 9° – 39.5° per side Knife length up to 430 mm / 17" in. Angle setting precision up to 0.01° Abrasive length up to 210 mm / 8.3" in. Knife spine thickness 1 – 7 mm / 0.04" – 0.28" in. Clamping force up to 300 N Sharpener weight 2.9 kg / 6.5 lbs Base weight 2.9 kg / 6.5 lbs Angle adjustment levels 3 (rough, fine, ultra-fine) Moving parts materials stainless steel, brass Angle finder charging USB Type-C