❶NEW DESIGN: U-shaped drain groove, spiral handle design, easy to remove chips during work, smoother drilling. 10 pcs drill bit set with 6mm (1/4”) sizes: that is 10 x 6mm fit your different needs. ❷EXQUISITE 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. ❸HIGH-QUALITY MATERIALS:It is made of high quality YG6X alloy as raw material. The process of oxynitriding of the cutter head strengthen the drill hardness. ❹NON-SLIP 1/4 HEX SHANK: 1/4 hex shank which makes the electric drill more tight and not easy to slip Making it safer to use ❺WIDELY USED: It can be used for drilling walls, bricks, wood, glass, tiles, stainless steel, concrete, etc. Remember to add Water or coolant when drilling. GREAT DESIGN: U-shaped design allows the drill bit to be smoother during use. Triangular drill bit positioning drilling will be more accurate. Feature: Material: cemented carbide Color: Black Shank:1/4 hex shank Cutter head type: Cross Surface treatment: new environmentally friendly plating process Size:6mm (1/4”) Package list: 10pcs with 6mm (1/4”) Drill Diameter & 6.35 mm shank Diameter 1pc plastic box Attention: When drilling hard material (glass, porcelain floor tile, marble or granite), please using water for lubrication. 5mm are small size, please do not use impact mode when using Please take protective measures when using, pay attention to safety