The extended finger produces more rotation of the wrist during the release, generating increased length and backend hook angle by creating more side roll. Furthermore, straight wrist position with extended index finger support aids bowlers with inadequate side roll to create sustained hook and a greater angle of entry in the pins
I purchased a ZL1 elsewhere, so I understand if you do not post this review. I personally own an old Cobra wrist support. Circa 1990, The black original with the fixed wrist, and the finger support. I was hoping to use the ZL1 as a backup but the construction leaves me with something to be desired. The shape and strength of this unit is fine, but what I really do not like about it is how it is constructed. The original Cobra (that this seems to emulate) is a metal back with a foam cushion, and it has 2 straps. The ZL1 has a similar metal backing, but instead of having the foam Like the Cobra, the ZL1 is wrapped around the metal with a soft cloth with a vinyl back. What this does for me is it does not feel as secure, it wants to move around a little while I wear it. I have to wear a wrist support as I broke my Scaphod in my Wrist, so I do not use one of these for want, it is necessity. If I ever break my cobra, I will be trying to repair it rather than try to use this for any length of time.
I do not have very big wrist or forearm, but the strap just barely gets around to fasten into place. With my Cobra I was able to wear a wristband underneath it to avoid sweating, but this one it is impossible to wear the wristband under it.
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