10pcs 20-42mm Diamond Drill Bit Set for Tile Glass Marble Granite Cutting

100% new and high quality. Diamond glass marble tile cutting. Simply mounted on the ordinary hand drill can be used need to add coolant when drilling drilling force should be playful especially when at the beginning of the drill and to drill through. After notching easy decoration chip easily no distortion good stability. Apply to ordinary glass tile openings rounded beads etc. mainly used for glass openings. Product name: Diamond Material: metal Color: Silver diameter: Approx. 20mm/0.78 inch 26mm/1 inch 30mm/1.18 inch 35mm/1.37 inch 42mm/1.65 inch Blade length: Approx. 3mm/0.11 inch Length: 50-50mm/1.96 inch -2.16 inch Shank Diameter: Approx. 7-8mm/0.27 inch -0.31 inch Weight: 292g Package Include: 2x 20mm with 7mm dia. Drill 2x 26mm with 7mm dia. Drill 2x 30mm with 7mm dia. Drill 2x 35mm with 7mm dia. Drill 2x 42mm with 8mm dia. Drill Only the above package content other products are not included. Note: Light 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.