Syntec 1" GCB25BK Pro Diamond Wet Core Drill Bit for Concrete Drywall Screws concealed connection between a header/post

concealed connection between a header/post and a beam

making them the perfect choice for outdoor projects exposed to moisture

helping to resist rotaion around the base

These Precut diamond blades are used on gas saws and are for wet applications

5/16" hex head (replacement driver bit — BITHEXR516-R1)

Syntec 1" GCB25BK Pro Diamond Wet Core Drill Bit for Concrete Drywall Screws concealed connection between a header/postSyntec has been working hard for over two decades to manufacture exceptional power core bits for the construction industry. Syntec's diamond drilling tools can be used for a wide range of applications whether it is light or heavy duty drilling. The GCBBK Pro core bits are an ideal option for drilling into medium to hard concrete with medium steel reinforcements. Syntec's drill core bits feature diamond tipped segments and fittings comprised of sturdy