This lens drilling machine is ideal for drilling hole in the glass & plastic lenses of rimless glasses. Spare parts are well-made of stainless steel , aluminium pipe, with light or handrail,big power motor.Opposing tapered drill bits bore holes both sides of the lens at the same time. It makes accurate drilling and effeciently protects lens from chipping or breaking, specially for glasses lenses.The lens position is set through the dial. The groove depth is adjustable.