The Extended Vise Grip Locks are extended bolt versions of the original locks. They are only necessary if you have thick walls, thick door jambs, and/or thick trim. There are two Lock extender sizes depending on your specific doorway measurements; however, very few doorways require the longest lock extenders so make sure you order the one that will work for your doorway.
Measure Twice Order Once!
You need these only if the measurement from your door jamb (the ridge against which your door closes) to your outer trim is between 4 3/4″ and 6 3/4″ inches (12-17 cm) for the regular extender or 6 3/4″ and 8 3/4″ inches (17cm – 22cm) for the super long extender. Easiest way to measure is to close your door, measure from that point forward to the front trim–that is the number that matters. They come in sets of two so ordering one of these extender sets in your cart will result in 2 being delivered, one for each side of your Gym1 core unit.
Choose the correct Extended Vise Grip Locks size for your trim thickness from the drop-down menu. Note again that very very few doorway trim situations ever require the super long locks which fit the 6 3/4 to 8 3/4 gap so please measure carefully only from the door jamb to the front of your trim. Front of the trim is opposite the side of your doorway from where your door swings out–so again, just close your door and measure from that point forward to the front of your trim.
If you have any doubts, shoot us a quick email to email@example.com and feel free to include pic(s) or a video about your unique doorway so we can diagnose and advise.