What about durham pin is true ?

Ans. is 'd' i.e., All the above Denham pin It is a type of pin used to give skeletal traction. Threaded poion of the pin engages the bony coices and reduces the chances of pin sliding. This type of pin is used commonly to give skeletal traction through the cancellous bone i.e. calcaneum. It can also be used to give traction through osteoporotic bones.