I agree with illusion, there about as easy as it gets, i was lucky i was walking through wallmart and they were redoing the jewlry section, and i saw in a box all these wafer locks i asked if they were gonna trash them, ofcourse the said yes so i op'ed to take them. The handed over no problem. I thought umm free locks? niceeee but anyway the ten locks i got were all typical wafers and to say the least for something protecting diamonds.. well wal mart diamonds

they were horrible, two seconds basically the time it took my standard snake to run two passes on the wafers and click... there really no challenge, i would suggest a kwickset, there good for repinning and practicing.
Andy
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