9PCS Concrete Drill Bit Set: In the concrete drill bit set, it includes 9 pieces of concrete drill bit, the diameter is 5mm, 6mm, 6mm, 8mm, 8mm, 10mm, 12mm, 14mm, 16mm. These two drill sizes of 6mm and 8mm are very frequently used, which is why the set contains two SDS drills of 6mm and 8mm. Hard Alloy Material: SDS plus drill bit set is made of quality hard alloy steel, which has high service life and durability, at the same time more resistant to pressure and deformation. The concrete drill bit has four cutting edges, which can speed up the drilling progress during use. X-Shaped Drill Bit: This concrete drill bit set has an innovative X-shape , and has a unique wide NUT design to achieve the best drilling effect. The double groove hard spiral style can quickly clean the dust during drilling. Compact Storage Box Included: For your convenience, in the package there is also a compact storage box , all sizes of concrete drill bits are placed inside the convenient rotating box so you don't have to worry about losing them. Wide Application: This set drill bit suitable for all standard hammer drills with SDS plus sockets. At the same time, the concrete drill bit kit can be used in various occasions, such as concrete, ceramic tiles, stone, wood, aluminum, plastic, cement etc. < p>Specifications: Rod type: SDS plus Quantity: 9 pieces Total length: 160mm Diameter: 5mm, 6mm, 6mm, 8mm, 8mm, 10mm, 12mm, 14mm, 16mm Packing list: 1 pcs box compact storage box 1 pcs 5mm x 160 mm 2 pcs 6mm x 160 mm 2 pcs 8mm x 160 mm 1 pcs 10mm x 160 mm 1 pcs 12mm x 160 mm 1 pcs 14mm x 160 mm 1 pcs 16mm x 160 mm