We just put five new styles of spring assisted knives into stock. Four of them are liner lock knives and the fifth is a framelock knife. All five of them sport both a thumb stud or plate of some type as well as a spine flipper of some style. These are great spring assisted knives at really good prices. My two favorites of the bunch are the Spring Assisted Grenade knife and the Pharaoh spring assisted knife. Check them out at BladeOps.com.