【WIDE APPLICATIONS】 - Lens grooving and drilling machines are widely used in optical stores, vision care centers and any lens industry that requires grooving and drilling. 【OPTICAL LENS GROOVER DRILLING MACHINE】 - Dual purpose (drilling and sawing) ideal equipment for frameless Lens processing. Suitable for CR, sawing groove. 【ADJUSTABLE SLOT DEPTH/DRILL POSITION】 - drilling head, accurate adjustment of drilling position, drilling diameter can be preset to adjust.Easy operation of sawing groove, the 0.8~1mm depth of groove can be adjusted at will. 【NO DAMAGE TO YOUR LENSES】 - Double-sided drilling systems, drilling without gaps. Beautiful appearance, the lens does not break. Grooving material: resin, glass and so on. SERVICE： If you encounter any problems when using this product， please contact us in time. We will reply you within 29 hours， please rest assured to buy.