Cancellous screws are designed to be used in metaphyseal bones. 4.0 mm Locking Head Cancellous screws find application for the treatment of fractures of large bones and large bone fragments like femoral neck fractures, ankle arthrodeses, subtalar arthrodeses, and tibial plateau fractures. These are self-tapping screws that can tap their hole during application. Cancellous screws have a coarse pitch which provides them with good resistance to loosening. Siora Surgicals Pvt. Ltd. is a renowned orthopedic implant manufacturer in India that produces a CE-certified range of orthopedic devices including 4.0 mm Locking Head Cancellous Screw Full Thread Self Tapping. The company is also a renowned OEM/contract manufacturing service provider across the globe. https://www.siiora.com/product/4-0mm-locking-head-cancellous-screw-full-thread-self-tapping-star-drive-2/