Item Type: Hole Opener_x000D_ Material: Diamond_x000D_ Color: Blue_x000D_ Total Length: Approx. 68mm / 2.7in_x000D_ Female Thread: M14_x000D_ Scope Of Application: For drilling marble, granite and other stones 1[DIAMOND MATERIAL] The hole opener is made of excellent diamond material, with high hardness and wear resistance. 2[HIGH EFFICIENCY] The diamond hole saw has incisive head, with fast drilling speed and fast chip removal. 3[LOW RESISTANCE] The cut out design is larger, which greatly reduces the resistance when opening the hole. 4[M14 FEMALE THREAD] With standard M14 female thread, it can be easily installed on power tools without falling off. 5[APPLICABLE MATERIALS] Suitable for drilling granite, ceramic tiles, concrete, marble and other materials.1 x Hole Opener