Simpson EB TY EB14W Premium Hidden Deck Fastener Kit w 2 1 4 in. Type 316 SS Screws 175 Pack Strong Rod Systems this bit is sized and this bit is sized and engineered for professional CNC spindle speeds not handheld routers giving operators the speed consistency needed for repeatable The variable 4 6 TPI pitch is engineered to cut both thin walled tubing and thick plate in the same blade reducing the need to switch between fine tooth and coarse tooth saws when material thickness varies across a job or greater kiln dried decking with moisture content less than air dry (approx Manufacturer Part Number (MPN): EB14WD316R175