Lieber german full professional 400w 6 levels speed adjustable engraving hobby sanding set2 years warranty340 partsprofessional usemarble granite glass plastic iron can be used on surfaces such as wood stone features speed adjustable 400w power, 78000 rpm maximum speed collet set in various sizes contents accessories for grinding abrasion sanding accessories polishing polishing accessories metal brass corrosion receiver accessories wood metal plastic drill bits wood saws writing bits on glass or porcelain objects you can order up to 10 pieces of this product. swordslife reserves the right to cancel orders over 10 units. more than 100 stocks will be put on sale at the promotional price. buy the selling price of the product you reviewed. it is set by the seller. this product is not in the discount promotion. Improved version for clearer understanding and better search visibility. Suitable for users seeking detailed and reliable product information.