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$39.99

COAST warranties its COAST knives, tools and COAST LED Flashlights/Headlamps to be free of defects in materials and workmanship for the life of the original purchaser. This warranty does not cover normal wear and tear, nor damage resulting from misuse or neglect. Warranty does not cover batteries and charging accessories (or damage caused by either). Batteries or damage caused by batteries (i.e. leakage) not included in the guarantee.

To begin the warranty process with your COAST product, please complete the Online Warranty Request Form.


"I set out to design a no-limits knife with tactical styling, advanced mechanics, and a performance edge on the street and in the woods. Grippy and tough, the injection-molded flat dark earth handle conceals COAST-patented blade assist technology on the...

"I set out to design a no-limits knife with tactical styling, advanced mechanics, and a performance edge on the street and in the woods. Grippy and tough, the injection-molded flat dark earth handle conceals COAST-patented blade assist technology on the inside -- for fast, authoritative opening at the flick of your thumb. And for safety, the COAST Max Lock™ and Liner Lock™ double down on rock-solid hand protection. Inspired by ancient Japanese bladesmithing, the 3.5-inch, partially serrated Tanto-style blade is made from 9Cr18Mov steel with a flat black titanium nitride corrosion-resistant coating, ideal for piercing, cutting, and slicing with a long-lasting edge. Powerful inside and out, the RX357 is always more than meets the eye."

Doug Hutchens

Lead Knife Designer

  • Features
    • Blade Assist

      From closed to open in a flash. Knives with COAST’s Blade Assist mechanism use a proprietary opening mechanism to release the knife blade faster, smoother, and more safely than other blade-assist systems on the market. Operating Blade Assist is as simple as gently push the studs on the side of the blade until it pops open. Only available on knives equipped with Max-Lock.

    • Liner Lock

      Safe, single-handed blade control. Knives equipped with a Liner Lock use the knife’s interior stainless liner as a locking mechanism and allow you to keep one hand free while opening and closing the knife.

    • Max-Lock

      Take safety to the extreme. COAST knives equipped with the Max-Lock system can lock the blade in either the open or closed position. Locking the blade closed prevents the assisted opening mechanism from accidentally engaging in your pocket. Locking the blade open protects your fingers from an accidental closure during use. Knives with Max-Lock also have a standard Liner-Lock to make the knives twice as safe.

    • Three Position Knife Clip

      Carry your knife how it suits you best. Use COAST’s Three Position Knife Clip to adjust the pocket clip to how wear the knife, with easy access to your dominant hand.

    • Thumb Stud

      Open the knife with a quick flick. Small studs mounted on each side of the knife blade allow for easy, one-handed opening.

  • Specifications
    • Blade Length 3.58 in / 9.09 cm
    • Blade Material 9Cr18Mov Stainless Steel
    • Handle Material Nylon
    • Length Closed 5 in / 12.7 cm
    • Length Open 8.46 in / 21.48 cm
    • Weight 5.57 oz / 158 g
  • Blade Assist

    From closed to open in a flash. Knives with COAST’s Blade Assist mechanism use a proprietary opening mechanism to release the knife blade faster, smoother, and more safely than other blade-assist systems on the market. Operating Blade Assist is as simple as gently push the studs on the side of the blade until it pops open. Only available on knives equipped with Max-Lock.

  • Liner Lock

    Safe, single-handed blade control. Knives equipped with a Liner Lock use the knife’s interior stainless liner as a locking mechanism and allow you to keep one hand free while opening and closing the knife.

  • Max-Lock

    Take safety to the extreme. COAST knives equipped with the Max-Lock system can lock the blade in either the open or closed position. Locking the blade closed prevents the assisted opening mechanism from accidentally engaging in your pocket. Locking the blade open protects your fingers from an accidental closure during use. Knives with Max-Lock also have a standard Liner-Lock to make the knives twice as safe.

  • Three Position Knife Clip

    Carry your knife how it suits you best. Use COAST’s Three Position Knife Clip to adjust the pocket clip to how wear the knife, with easy access to your dominant hand.

  • Thumb Stud

    Open the knife with a quick flick. Small studs mounted on each side of the knife blade allow for easy, one-handed opening.

  • Blade Length 3.58 in / 9.09 cm
  • Blade Material 9Cr18Mov Stainless Steel
  • Handle Material Nylon
  • Length Closed 5 in / 12.7 cm
  • Length Open 8.46 in / 21.48 cm
  • Weight 5.57 oz / 158 g