The BTT tools have a compact in-line design specially made for applications with limitations in clearance. The innovative hydraulic piston arrangement makes for a smaller diameter cylinder and gives a shorter center to edge distance the entire length of the tool. The series offers a choice of diameters to meet the customer's needs: the BTT25 can be used for the diameters of 12mm and 14mm; the BTT35 is used for 16mm; the BTT 57 for 20mm diameters.