Progress Golf BB6 Driver Head
Other shaft options are available. All BB4s are to be shafted and no head sales.
Our new AutoFlex SF505 is 51 gram, SF505X is 54 gram.
If you are a swinger who swings smoothly, SF505 will be good.
If you swing aggressively and fast, SF505X will be better.
X doesn’t mean the Flex as the other shaft brands.
Our X means, this holds better with the faster swing.
New AUTO FLEX Shaft
SF305X / 39 gram / Ladies / Swing Speed 65~85 mph
SF405 / 43 gram / Mens / Swing Speed 85~95 mph
SF505 / 51 gram / Professionals / Swing Speed 95~105 mph
SF505X / 54 gram / Long Drive Player / Swing Speed 110~125+ mph