Contains 5 tips for the second-generation Piezotome piezoelectric bone-surgery devices to perform internal sinus-elevation procedures from the crestal approach. TKW 1 through 4 tips are used to create and shape the osteotomy; TKW5-2 tip is blunt with an internal irrigation designed to gently lift the sinus membrane using ultrasonic vibrations combined with irrigation. They are compatible exclusively with the Piezotome 2, Implant Center 2 LED, and Piezotome Solo LED.