Compatible with Implant Direct and Zimmer. Small, Medium and Large sized keys. This is a completely new and different product from last years model. Completely redesigned in dark blue, with smaller more ergonomic handles, easier inner diameter with polished bevel for easier insertion, new sleek sterilization cassettes, and new larger diameters in the medium which allows you to place up to a 4.7 in dense bone or a 5.1 in soft bone. The new large 5.1 key will allow users to place up to a 7mm implant. The small size goes up to a 3.4mm drill, the Medium to a 4.4mm drill and the Large to the 5.1mm drill. Comes with 3 individual sterilization cassettes.