Rough Rider RR1077 Amber Jigged Canoe Lock-Back (Canittler)
See also Locking Canoe Whittlers
I'm not aware of another company making this pattern. Rough rider offers it in four handle patterns. All blades operate on their own springs with the spear master using the center lock back spring. This spring protrudes ever so slightly when the knife is closed. I don't consider this a reason not to but the knife but more an inherent design flaw caused by the location of the center lock. The lock is positive and all knives in the series are excellent.
Very Nice Amber jigged bone and very typical of the Rough Rider line.. Blades open smoothly and work on their own spring. If you like amber jigged bone, this is the canittler for you.