Titleist 621.JT (6-9 iron)

“Thomas’ iron play also was on target as he ranked second in the field greens in regulation at 69.44 percent with his 621.JT custom muscle-back blade irons with Dynamic Gold Tour Issue X100 shafts and Golf Pride Tour Velvet cord grips.”

“This is where it all begins for Thomas’ 621.JT irons — a one-off muscleback design that surfaced late last year and came about after Titleist’s R&D team attempted to create a forgiving blade with higher launch characteristics.”

“Justin has been developed by Titleist a one-of-a-kind prototype set of irons (621.JT). Made just for him to feature zero offset, which is something he prefers when he looks down on the ball.”

“In his regular set up Thomas opts for a Titleist T200 4-iron before moving into a T-150 5-iron and then transitioning into a set of the Titleist 621.JT blades from 6 to 9-iron.”

“Thomas plays a set of custom Titleist 621.JT blades built to his exact specifications”

“Thomas, on the other hand, prefers “zero offset” in his 621.JT blades.”

“Irons (4): Titleist T200; (5): Titleist T100; (6-9): Titleist 621.JT”

“Irons: Titleist T100 (4-iron; True Temper Dynamic Gold Tour Issue X100 shaft), Titleist 621JT (5-9; True Temper Dynamic Gold Tour Issue X100 shafts)”

“IRONS: Titleist T200 (4), Titleist T100 (5), 621.JT prototype (6-9), with True Temper Dynamic Gold Tour Issue X100 shafts”

“Irons: Titleist T200 (4), Titleist T100 (5), Titleist 621.JT (6-9) – Shafts: True Temper Dynamic Gold Tour Issue X100”

“There’s a lot of cool stuff in Justin Thomas’ golf bag, from his prototype Mitsubishi Diamana driver shaft to his custom one-off set of Titleist 621.JT irons .”