7-piece tool set for installing photovoltaic systems. Includes one adjustable torque screwdriver (pistol handle) 7442 with a measuring range of 3.0-6.0 Nm and a digital torque value display. Features a reliable slip-over mechanism and an audible signal when the set torque is reached. Also includes one 889/4/1 F Rapidaptor bitholding screwdriver with a fast-rotating function for quick return movement without removing the tool during clockwise torque operation. Comes with one 6003 Joker ring spanner, designed with special open end geometry to expand placement possibilities, making it particularly suitable for narrow spaces. Additionally, there are two installation tools for MC4 solar connectors (Multi-Contact): one 1/2" socket (with side wire cutout) size 17 for installing panel connectors, and one tool shaft (adapter 1/4" to 1/2") for manually operated socket wrench inserts.