Automatic case opener with 3 interchangeable blades for snap-on backs

Designed for snap-on watch case backs, this efficient tool streamlines your tasks with its adjustable impact mechanism. The handle of the case opener is equipped with a spring and a firing pin which, when activated, releases a micro-impact to open case backs efficiently. The impact strength is adjustable by turning the handle: screw for stronger power or unscrew for softer power.