The Bosch KZW features a trigger guard, palm rest, quick-release button and trigger which are oriented for downward use to facilitate using the clamp to quickly and efficiently grip the workpiece from underneath. By contrast, other branded clamps have the palm rest and other controls oriented in the standard "handgun" position.

Bosch FSN KZW Professional "Fast Fix" clamps pair for guide rail systems
For quick and reliable clamping of the guide rail onto the workpiece

2x Guiderail Clamps (1x Pair)