The Emerson "wave shaped opening feature" is a fast, effective, and impressive way to open your knife.

The patented Emerson "wave shaped feature," a small wave-shaped tab on the top of the blade that's built to catch on your pocket seam, opens the knife as you withdraw it from your pocket. This instant-open feature is a favorite among military, rescue, and law enforcement knife users.

But it does take a little practice.

Enter the Kershaw-Emerson E-Train, our “Emerson trainer” knife. The blade is unsharpened so you can safely practice using the “wave shaped opening feature” without endangering either your pocket or your fingers.

The E-Train’s G-10 front scale is in “safe-training blue” for easy identification. There's a left/right reversible pocketclip so you can easily carry it with you to train whenever you have a spare moment. 

• Designed by Emerson, built by Kershaw
• Unsharpened trainer model
• Thumb disk; "waved shaped opening feature"
• Manual opening
• Reversible pocketclip, (left/right)
• Steel: 3Cr13, stonewashed finish
• Handle: G10 front, steel back
• Blade length: 3.2 in. (8.1 cm), unsharpened
• Closed length: 4.5 in. (11.4 cm)
• Overall length: 7.7 in. (19.6 cm)
• Weight: 5.1 oz. (146 g)