10pc 3/16” Dry Diamond Drill Bits +10pcs Masonry Drill Bits Set Carbide Tip for Glass, Brick, Tile, Concrete, Plastic and Wood with Size 3/16” (5mm),1/4” (6mm), 5/16” (8mm),3/8” (10mm), 1/2” (12mm).

A set of 10-Piece Diamond Drill Bit Package includes: 10pc 3/16 inch (5mm) diamond drill bits diameter 10PCS Concrete /Ceramic Tile Dill Bit Dimension: 3PC 3/16” (5mm)(Dia) x 98mm(L) 3PC 1/4” (6mm) (Dia)x 98mm(L) 2PC 5/16” (8mm) (Dia)x 117 mm(L) 1PC 3/8” (10mm) (Dia) x 118mm(L) 1PC 1/2” (12mm) (Dia) x 120mm(L)

• NEW DESIGN: U-shaped drain groove, spiral handle design, easy to remove chips during work, smoother drilling. 10 pcs drill bit set with 5 different sizes: that is3/16” (5mm),1/4” (6mm), 5/16” (8mm) ,3/8” (10mm), 1/2” (12mm) fit your different needs.
• EXQUISITE CRAFTSMANSHIP: The surface of the drill bit is treated by fine polishing, and the new electroplating process can prevent the drill bit from rusting and prolong the life of the drill bit.
• HIGH-QUALITY HARD ALLOY: The cutter head is made of cemented carbide. Hardness up to 45HRC, Triangular cutter head resistance is smaller. And it can improve work efficiency, higher hardness than ordinary drill bit, more wear-resistant.
• Dry Drilling Design: while dry drilling,wax lubricant inside diamond core drill bit could cool the cutting surface; Water can be used as additional cooling for long-time drilling
• 10pc - 3/16” (5mm) Dry diamond drill bits with hex shank. Diameter 3/16” total length 65mm