As with the Babicz FCH Tune O Matic Bridge you can adjust the saddle height and lock it with two hex screws behind the saddle, with the ABR 1 Bridge, once the notches were cut for the strings that was it, you take them down but not up, The Babicz FCH Tune O Matic Bridge takes your Gibson like guitars into the modern era of guitar parts that improve your instrument.
I took mine to a guitar tech to get two holes drilled where the Gibson Custom Shop ABR1 bridge was installed.