Strap buttons effectively prevent the strap from slipping off, although I don't do much moving around when playing. Long term durability of nylon would be an issue, but it's better than plastic.
I've used these Gripper Strap Buttons on several guitars I've built for clients (I'll submit a PICTURE of the latest guitar with gripper strap buttons). They hold the strap in place nicely if you position them correctly (the shape is the key - similar to a strap-lock - just don't jump around a lot or do guitar acrobatics). They also make it very easy to change guitars during a set, plus you don't have to dedicate a strap to them like you do a regular strap-lock.
My only complaint is that I wish these Grippers were cast in something like stainless steel, since I don't know how well the nylon plastic will hold up over time (I'd hate for a $2,500++ guitar to fall because the button broke due to it's age or the guitars weight). StewMac, please think about it???
Much cheaper ,and easier to deal with than some strap locks , especially if you don't do a lot of acrobatics on stage. :)
They're cheap, they look good and they do a good job keeping your strap on so I use a lot of them.
I have been through many forms of strap "keepers" on my guitars (Dunlop & Schaller strap locks, oversize buttons, various washers over the strap etc.). The mechanical locks stick out & you can't get the guitar in the case with the strap on, + they may vibrate some during playing. The washers work well but are a pain to get on & off. I have switched several guitars to the Grippers. They are cheap. lightweight, fit in the case, are easy to install, and hold the strap securely while playing but make it easy to take the strap off. I just bought some more for different guitars.
These worked really well on a few cigar box guitars I made. They installed nice and tight in the 1"x2" popular thru the body neck. Used many other stew mac parts as well.
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