This is the Viper Cutlery Katla, has 3D Dark Stonewash Titanium handles.  The blade steel is M390 and finish is Dark Stonewash.

*Our opinion:  The Viper effort on this run as compared to their entire catalog is 8.   Detent is a 3 on a scale of 1-4 with 1 being lightest.

Maker : Viper Cutlery
Model : Katla
Frame : Stainless
Slabs : 3D Dark Stonewash Titanium
Maker ID : V5984TI3D
Condition : New/Mint
Lock Type : Linerlock
Blade Steel : M390
Black Thickness : 175/1000
Closed Length : 4 1/2 inches
Longest Blade : 3 1/4 inches
Longest Sharp : 3 1/8 inches
Overall Length : 7 3/4 inches
Flipper Effort : 2
Detent Strength : 3
Clip : Tip up Titanium
Weight : 4.61 ounces
Factory Box : Yes
Blade Finish : Dark Stonewash
Country : Italy
*Factory Effort : 8
Notes: : Thrust bearings, Phosphor bronze back spacer