Features 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. Specification Item Type: Hole Opener Material: Diamond Color: Blue Total Length: Approx. 68mm / 2.7in Female Thread: M14 Scope Of Application: For drilling marble, granite and other stones Package List 1 x Hole Opener