A range of nylon rimless plugs to suit screw sizes 2.6-12.0mm.Finish: Grey Nylon.-For medium to heavy-duty applications.-Larger sizes suitable for use with coach screws.-Often used when fixing satellite dishes.-Can be inserted to depths below the base material.-Two way expansion allows use on close to edge applications. -Sprung spin fins provide a two way lock, preventing spinning and loosening from overhead applications.