... GLD-9 Specification: GLD-8 high-quality products, aluminum pipe, with light or handrail, big power motor.It is most applicable to ... groove cutting.Diameter of hole: 0.8mm-2.8mm, width of groove: 0.8-1.0mm. Lens Drilling ... Model no.: GLD-18 aluminum pipe, with light or handrail, ... competitive price.Photos and packing of lens drilling: HIGH QUALITY Lens drilling