The kit includes XO-10, XO-20, XO-30, XO-40, XO-50, XO-60, XO-77, and Sterlizaiton Cassette. The X-Otome is a hybrid, a cross between the periotome & a root elevator. Severing the PDL & creating space along the mesio distal plane is executed with precision & acuuracy, due to th thin honed ends. The tips preserve tissue structures & eliminate bone fracturing. The custom grip handle has a thumb rest for even power transfer of hand pressure. Also used to remove roots and root fragments, the X-Otomes are made in the USA out of 100% stainless steel.