Cooling directly at the cutting edge Horn presents Boehlerit's extended product portfolio for turning using tool holders with connections for internal coolant supply. The new tool holders are available with toggle clamp (ISO-P) and screw clamp (ISO-S) systems. Boehlerit's tool holders with connections for internal coolant supply are available from stock with a toggle clamp system (P) and a screw clamp system (S). The P tool holders are suitable for all ISO indexable inserts. There are no loose parts and only a few spare parts are required, making them easier to handle. The indexable inserts can be clamped quickly and securely. They can also be released easily. As no obstructions are introduced, smooth chip flow is guaranteed. The S tool holders also enable the insert to be secured simply and safely. In this case, a cone-shaped positioning screw is used. Here too, chip flow is not compromised and a maximum of three spare parts are needed. In both cases, the coolant is supplied at the back of the shank end as standard or from below the head as an option.