I have one of the orange plastic Fish Grips that I really like, but it seems its only fault is that it's not always secure on big fish.  I've had a few large pike shake off, as well as a big carp I caught this weekend.  

Is there an inexpensive Boca-style gripper that is more secure?  I see that Bass Pro offers a pistol grip version for about $15.00.   I don't need a scale...

Thanks for any recommendations,

Bob

http://www.amazon.com/Entsport-Gripper-Professional-Stainless-Measuring/dp/B01C85DN3U/ref=sr_1_1?s=sporting-goods&ie=UTF8&qid=1457966543&sr=1-1-spons&keywords=fish+grip&psc=1

This one is what I have. IT works good for landing 12 pound cats I fish on a regular basis. Even when they twist is holds up. 

I have the Bass Pro pistol grip and it works well for me, though you may want to beef up the lanyard connection, the provided split ring is weak and could pull out on a larger fish.