The CL-7000 is designed for production environments where torque repeatability is a must to maintain quality standards. Intended for vertical insertion of fasteners. Also recommended wherever cleanroom assembly or static control is an issue. Each driver comes with two torque spring types which are color-coded, a yellow (light) and a purple (heavy). - The CL series is electric torque screwdriver that is designed for heavy-duty production and delivers reliability and precision torque. Ensures accuracy in fastening with precision automatic shut-off clutch once preset torque is achieved. External torque adjustment.