Hard to see but that may be a torx head. Could be metric hex ( Allen)
Could be a security ( since this is apartment, so tenants can't pack up door knobs when they get evic... I mean move out) or a proprietary fastener, needing a special tool. What is brand of lock set?
If you are replacing it anyway you might could drill it out.
[CENTER][FONT=Comic Sans MS]Measure twice, cut once.[/FONT][/CENTER]
[CENTER][FONT=Comic Sans MS]Look at the nail, not the hammer. Watch the fence, not the blade.[/FONT][/CENTER]
[CENTER][FONT=Comic Sans MS]If you hook your thumb over your belt you won't hit it with the hammer or leave it layin on the saw table.[/FONT][/CENTER]
Last edited by notmrjohn; 10-27-2012 at 03:54 PM.