Cobra golf bio cell graphite combo ironhybrid setset includes mens right hand graphite shafted regular flex number 4 and 5 hybrid club and irons 6 sw inclusive 8 pieces bio cell irons are packed with game changing technologythe long and mid irons feature heavy tungsten weights strategically positioned in the heel and toe for more forgiveness and the short irons have the tungsten positioned directly behind the hitting area for a solid feel optimal spin control and versatility as you