uxcell 10mm Diamond Coated Core Round Shank Drill Bit Glass Hole Saw 20pcs Cutting Diameter: 10mm/ 0.4"; Product Name: Glass Hole Saw Material: Metal, Diamond Coated; Package Content: 20 x Glass Hole Saw Weight: 149g; Shank Size: 6 x 18mm/ 1/4" x 0.7" (D*L) Total Length: 50mm/ 2"; Main Color: Silver Tone Features: Straight Shank; Suitable for: Marble, Tile, Glass, Granite, Stone