Lowering an EZ bar past the forehead toward the top of the head, rather than straight down to it, changes the bar path of a standard skullcrusher and keeps tension on the triceps through a slightly different angle. Tucking the elbows in as the bar descends protects the shoulders from the extra range.
Log your ez bar california skullcrusher sets in 1RM.fit and watch your estimated 1RM update automatically as you get stronger.