For fixing timber sections to steel sections. No pre-drilling required. The wings provide clearance as you drill through the wood and break off when they connect and fix to the steel section.
 
 
 
 
 
For steel sections 1.2-3.0mm thick.
 
 
Will fix up to 21mm thick timber.
 
 
Phillips No. 2 drive.
 
 
Total length: 38mm
 
 
Screw diameter: 4.8mm
 
 
Bright zinc plated finish.