The Twosun TS117 "Grandpa" is an beautiful knife. The materials used and the fit and finish are excellent. The blade steel on the one I received was M390, wow, outstanding for the price. Action is great and knife is very comfortable in hand. Excellent price, customer service and fast shipping from White Mountain Knives.

Pros:
+ Titanium bolster/framelock construction
+ Smooth ceramic ball-bearing washer pivot
+ Fit and finish are excellent
+ Blade primary and secondary grind consistency is excellent
+ Carbon fiber onlays are countoured, void-free and well-matched to the titanium "bolsters"
+ Multiple opening options (YMMV) - flipper, thumbgroove, middle finger flick?
Neutral:
= Titanium machined pocket clip with etched "Grandpa"
Cons:
- Blade thickness and primary grind leaves it somewhat thick near heel of blade and considerably thinner near the tip. Not especially efficient slicer or push-cutter.
- Blade groove not quite sharp/deep enough for middle-finger flicking
- Free-spinning pivot screws - makes assembly a little more difficult.

Overall: very high-value in terms materials and fit and finish; steel and blade geometry perform well ; handle is comfortable and ergonomic for most urban EDC use.

I love my granpa (TS117) with the 14c28n razor sharp blade and the carbon fiber/titanium scales the buttery smooth action on the ball bearing pivot upon deployment is awesome great customer service and fast shipping