Industrial Concentricity Laser Module / Precision Laser Module Model : CLM-520-01 LPO Industrial Green Dot Laser Model : VLM-520-01 Series Industrial Green Dot Laser Model : VLM-520-51 Series Economic Industrial Green Dot Laser Module Model : VLM-520-74 Series Concentricity Laser Module / Precision Laser Module Model : CLM-520-02 LPT Industrial Green Dot Laser Model : VLM-520-02 series Industrial Green Dot Laser Model : VLM-520-53 Series Economic Industrial Green Dot Laser Module Model : VLM-520-73 Series Concentricity Laser Module / Precision Laser Module Model : CLM-520-12 LPT Ultra-Far Range Laser Model : VLM-520-17 Series Industrial Green Dot Laser Model : VLM-520-52 Series Industrial Use Laser Module Model : VLM-520-00 LPA Concentricity Laser Module / Precision Laser Module Model : CLM-520-11 LPO Industrial Use Green Laser Model : VLM-532-43 Series Green Circular Dot Laser Module Model : VLM-520-60 Series