Description:10pcs 8-50mm Diamond Drill Bits Set Tool Hole Saw Cutter for Glass Marble GraniteSpecification: Material: Nickel Plated Hole Saw Diameters: 8mm\/0.31!#!amp!*!quot;、 10mm\/0.39!#!amp!*!quot;、 12mm\/0.47!#!amp!*!quot;、 14mm\/0.55!#!amp!*!quot;、 16mm\/0.63!#!amp!*!quot;、                                        18mm\/0.71!#!amp!*!quot;、 20mm\/0.79!#!amp!*!quot;、 22mm\/0.87!#!amp!*!quot;、 25mm\/0.98!#!amp!*!quot;、 50mm\/1.97!#!amp!*!quot;    Features: Good Performance and long life. Excellent for making clean and accurate hole on glass and tile. Works better with a electric drill (Excluding in the item). These Diamond Bits are Capable of Drilling into Extremely Hard Materials Such as Stone and Glass. Use a Low Speed Setting and Proper Cooling、 Such as Water、 to Ensure Longer Lasting Life. Superior Performance - Cut Holes in Marble、 Slate、 Glass、 Tile、 Stone、 etc. Great for Home、 Hobby、 Craft、 Construction、 etc.  Package Included: 10 x Hole Saw  More Details: