The Strike Bundle offers strike and related bench tools. The Regulating Rack presents the three dimensions of strike: in-out by positioning of rack, side-to-side by adding spacing scale to templates from hammers or their wearmarks, and up-down with the templates set to string heights. It also offers heights using strike as their index by lowering and raising the rail and shifting its position as needed relative to the action. When strike has been set up on the rack, it can be recorded as insurance against template shifting or for a later return to that setup using either the String Height Gauge with Rail or the Underlevel/String Height Gauge. You may want both as the Underlevel is an expedient string leveling tool (from underneath as its name implies). Best to fit strings to hammers made vertical at strike, but there are times when this tool may help. The Adaptor and Extension Cable are for plugging in the Regulating Racks LED lights. The Sharpie records both scale and template heights (erasable with alcohol) and the Center Punch dimples a permanent template (string) height measurement in a String Height Gauge's aluminum plunger.