Part number 343409980: electric tool switch with speed control providing a variable 02800 RPM for load applications, specifically designed for SBE650, BE561, and BE560 tools. Sealed, debrisresistant design: maintains stable operation in harsh workspaces by preventing dust and debris intrusion during tasks such as concrete drilling, furniture assembly, and mechanical repairs. Target users and applications: ideal for professional contractors and DIY enthusiasts who require reliable power regulation on construction sites, renovation projects, or home workshops. Ergonomic and durable: features an ergonomic button with pressuresensitive activation, waterresistant construction, and industrialgrade switching rated for 50,000+ clicks under rigorous testing conditions. Use scenarios: Concrete drilling on a construction site where controlled speed improves bit life and material handling. Precision furniture or cabinet assembly requiring steady, adjustable power to avoid damage. Mechanical repairs in demanding or damp environments where debris protection and reliable activation are important.