Quick lettering, use for flexible and comfortable.Pen needles is made of special material, good durability.Depending on the difference of material to decide the depth.Works great on metal, wood, plastic, glass, stone, porcelain and other hard material.This configuration is great for marking tools, parts and more.Name:Pneumatic grinding penFor: final cleaning and polishing of dies, and jewelry and for hobbyColor: picture colorMaterial: plastic + steelLength: 143mmChuck size:3.0mmFree speed: 70000 rpmAir pressure: 90psiAir inlet thread: 1/4inch NPTPackage: 1* micro-mold type air grinder30* alloy grinding head10* grinding wheel head2* wrench1* boxOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.
