Screws in the D 2.0 CLASSIC system are available in a square hole lock drive design. The lock drive is one of the most stable and secure screw head configurations as compared to other design variants. The specifically designed asymmetrical profile of the thread provides for the self cutting or self tapping nature of the screw ensuring seamless screw placement even in cases of angulation variations while drilling the screw holes. The screws are available in lengths of 5mm to 17mm in a standard diameter of D 2.0mm and emergency diameter of D 2.3mm in lengths of 5mm & 7mm.