Finally we have multiple length drills with stops for CEREC Guide 1 and 2! This kit can accommodate drill lengths from 6mm to 16mm and implant widths from 3.0 to 6mm, guided. This kit is designed to be used with any implant system however we recommend using the last drill from the implant company you are using for that implant. For instance, if you are placing a 4.2mm diameter Legacy 2 Implant from Implant Direct drill up to the 3.65, then use the 3.8mm Implant direct drill non guided. The keys used are also compatible with drill diameters from the BioHorizon’s guided kit and if you need replacement drills, we recommend you buying them from Bio Horizons. Small, Medium and Large CEREC Guide 1 or 2 keys are included as well as 4 sterilizable cassettes. Measurements on the cassette represent drill length, so the D2 would be 1mm shorter than that for CEREC Guide 2 and 1.5mm shorter if you are using Biohorizon keys with these drills.