The New Front Of Center Outsert System is designed for those that want more weight upfront and ease of use of Outserts. The F.O.C.O.S is made of 3 parts. One is the black anodized 7075 T6 aluminum alloy outsert or Stainless Steel Option. Two is a Stainless steel Retention post In The Aluminum Outsert Model and Aluminum in the Stainless Steel Outsert Model that also acts as a footer inside the shaft. The third part is the 3/32 allen head retention screw that allows for the Outserts to either be screwed or screwed and glued.(Not Tattooed) This system has been tested to over 550 Pounds per square inch of pull and they stay on! If you are looking for maximum penetration, Maximum F.O.C and shot after shot performance then the deadly combination of the Deep Impact, Instinct or X-Impact shafts then the F.O.C.O.S are sure to be a hit!