3.5 X 50mm Reisser Cutter Woodscrews - Full Thread

Reisser Cutter Woodscrews are uniquely designed to give the ultimate performance and a perfect finish in all wood applications.
The two patented slots (25mm andd above) allow the screw to work closer to the edge without splitting, and the ribs and tucks under the head enable the screw to sit flush and tight without surface damage.
The 20 degree needle point gives the ability to penetrate almost all timbers without a pilot hole and the sharp, wide, deep thread with unique Reisser lubrication gives up to 40% less driving resistance and easy penetration. 
The yellow tropicalized coating gives superior corrosion resistance (compared to a standard BZP coating) and the deep reinforced countersunk head recess allows the best possible fit to the driver bit, reducing "cam out" and providing extra strength at the critical junction between shank and head.