Heretic Knife Hydra R/E Black Aluminum, Stonewashed MagnaCut by Tony Marfione Jr.
- Hydra Recurve Black Anodized Aluminium, Stonewsh an automatic knife you won't confuse with any other! An automatic of more than average strength, it works in S/A (Single Action) mode with the excellent MagnaCut steel on blade! Designed by Tony Marfione Jr


This product is intended for use only by adults with knowledge and experience in handling sharp cutting tools. Improper use of the knife can result in serious injuries. The blade is extremely sharp and can easily cut through skin and tissue; therefore, extra caution should always be exercised while cutting, and hands should be kept away from the cutting edge. To prevent the knife from slipping, it is recommended to cut on a stable, non-slip surface and avoid excessive force, which may cause uncontrolled blade movement.
Leaving the knife on the edge of a table, countertop, or in easily accessible places—especially where children are present—poses a significant safety risk. The knife should always be properly secured after use, ideally by placing it on a stable surface or storing it in designated knife blocks, protective sheaths, or magnetic strips. The knife should never be used for tasks it is not designed for, such as opening cans or prying objects, as this can damage the tool and lead to dangerous accidents.
A dull blade increases the risk of injury, as it requires more force and is more likely to slip from the material being cut. Therefore, it is essential to sharpen the knife regularly to maintain optimal sharpness. Additionally, proper cleaning and drying of the knife are necessary to prevent corrosion and bacterial growth. Periodic inspection of the handle and blade is recommended to check for cracks, chips, or looseness. If any damage is detected, the knife should be repaired or replaced immediately.
When using the knife, focus solely on the task at hand—avoid talking on the phone, watching television, or other distractions while cutting. Ensure proper lighting in the workspace for better visibility and control. Please note that some countries or regions have laws restricting the ownership and carrying of knives. Before purchasing or using this knife, verify that its use is legal in your location according to applicable regulations.
Following these safety guidelines will help ensure safe and effective knife use, minimizing the risk of accidents and extending the lifespan of the tool.
Hydra R/E Black Anodized Aluminium, Stonewshed MagnaCut one of the best OTF (Out The Front) automatic knives. It features the excellent fit and finish you would expect from a top of the range knife. The over-the-top automatic operates in S/A (Single Action) mode using a knife-opening mechanism that works with tremendous force and power. Designed by Anthony Marfione Jr. owner of Heretic Knives.
CPM MagnaCut - Powdered stainless steel produced using the Crucible® Particle Metallurgy (CPM) process hardened to 60.5-62.5 HRC. The high content of vanadium 4.0% (V), molybdenum 2.0% (Mo) and niobium 2.0% (Nb) guarantees accuracy and purity unmatched by more 'conventional' steels. Designed and developed specifically for blade production by Larrin Thomas, it meets all the requirements of knife enthusiasts. With CPM MagnaCut has succeeded in creating a steel that combines unique properties like no other knife steel. The result is a blade material that offers an extraordinary balance of wear resistance, strength and corrosion resistance. There is currently no other steel on the world market that offers a comparable combination of excellent properties. This unique steel is produced at Crucible® Industries' US steel mills.
S/A (Single Action) OTF - a knife with a blade that can be extended by pressing a button, but once extended the blade must be retracted by hand. This means that the blade can be ejected in less than a second, making this type of OTF very fast. However, the blade must be retracted when finished by pulling on the handle usually located on the back of the handle. One of the main advantages of single-action OTFs is the simplified mechanism which makes them very robust and durable. They require fewer parts, so there are fewer components that can break. This simplicity also means that the knife is less prone to failure during use.
Blade - R/E (Recurve Edge) type with a single cutting edge. Blade finished to mask minor scratches using the Stonewashed method. Plain blade, derived from a high concave grind (Hollow Grind), providing excellent cutting properties. This gives the knife excellent piercing qualities whilst retaining its strength. On the back there are characteristic "ribs", reminiscent of the mythical Hydra. The mechanism for extending the blade by means of a moled drop-shaped button under the thumb requires, for safety, the application of a specific force to overcome the resistance of the spring.
Handle - made on CNC milling machines with excellent precision, from black anodised 6061-T6 aluminium. There are notches (jimping) on the Handle for a more secure grip. The slim design allows the knife to be tucked into any pocket. The single-position (right) deep carry clip, allows the knife to be carried discreetly in the pocket in the tip-down position (blade tip down). The back of the handle extends to retract the blade and tighten the spring for the next opening.
Technical data:
Product number: H008-2A
Product name: Hydra RE Recurve Stonewashed, Black Aluminium, Stonewshed HW/Clip, Magnacut
Overall length: 232.0 mm / 9.125"
Blade length: 92.1 mm / 3.625"
Blade thickness: 3.9 mm / 0.155"
Handle length: 135.0 mm / 5.30"
Handle thickness: 11.9 mm / 0.47"
Weight: 147.0 g / 5.20 oz
Blade material: CPM MagnaCut
Blade hardness: n.d.
Blade grind: Hollow
Blade finish: Stonewashed
Handle material: 6061-T6 Aluminium
Handle finish color: Black
Backspacer material: 6061-T6 Aluminium
Backspacer colour: Black
Clip: Right, Tip-down
Clip material: Stainless Steel
Pivot mechanism: n.d.
Locking mechanism: Button Lock
Opening method: Automatic, Thumb Button
Additional accessories: None
Designer: Tony Marfione Junior
Brand: Heretic Knives
Manufacturer: Heretic Knives
Country of origin: USA
Developed by: Sharg® company