Most of the world's top 20 are tied up in equipment deals meaning they can't just pick and choose which irons they use. Brooks Koepka, Patrick Reed and Tommy Fleetwood are the only three players inside the top 20 who are free agents, leaving them to play with whichever irons they want.
So let's take a look at which irons the current best 20 players on the planet are using right now, starting with 20th in the rankings Shane Lowry and working our way down to world No.1 Rory McIlroy.
RELATED: The balls as played by the world's Top 20 golfers
#20 - SHANE LOWRY
Irons in play: Srixon Z 585 (4-5) | Srixon Z 785 (6-PW) | KBS Tour 130X shafts.
#19 - LOUIS OOSTHUIZEN
Irons in play: Ping Blueprint (3-PW) | Project X HZRDUS Red Hybrid and Dynamic Gold X100 shafts.
#18 - GARY WOODLAND
Irons in play: Wilson Staff Staff Model Blades (3-PW) | KBS Tour C-Taper 130X shafts.
#17 - MATT KUCHAR
Irons in play: Bridgestone J15CB (5-PW) | True Temper Dynamic Gold 105 S300 shafts.
#16 - TONY FINAU
Irons in play: PING Blueprint (4-PW) | Nippon Modus 3 120 TX shafts.
#15 - MARC LEISHMAN
Irons in play: Callaway Apex MB (3-9) | Nippon N.S. Pro Modus3 Tour 130X shafts.
#14 - JUSTIN ROSE
Irons in play: TaylorMade P730 (4-PW) | KBS Tour C-Taper 130X shafts. (Rose currently has an equipment deal with HONMA but it is rumoured he is about to split with the Japanese brand)
#13 - BRYSON DECHAMBEAU
Irons in play: Cobra King One Utility (4&5) | Cobra Forged One (6-PW) | LA Golf Prototype carbon fibre shafts.
#12 - XANDER SCHAUFFELE
Irons in play: Callaway Apex Pro (4-PW) | True Temper Dynamic Gold Tour Issue X100 shafts.
#11 - TIGER WOODS
Irons in play: TaylorMade P-7TW (3-PW) | True Temper Dynamic Gold Tour Issue X100 shafts.
#10 - TOMMY FLEETWOOD
Irons in play: Srixon Z785 (4&5) | TaylorMade P7TW (6-9) | Project X 6.5 shafts.
#9 - WEBB SIMPSON
Irons in play: Titleist 620 MB (5-PW) | True Temper Dynamic Gold Tour Issue X100 shafts.
#8 - PATRICK CANTLAY
Irons in play: Titleist T100 (4-PW) | True Temper Dynamic Gold Tour Issue 120X shafts.
#7 - PATRICK REED
Irons in play: Grindworks Reed Prototype blades (4-PW) | True Temper Dynamic Gold Tour Issue X100 shafts.
#6 - ADAM SCOTT
Irons in play: Titleist 716 T-MB (3-iron) | Titleist 680 (4-9) | KBS Tour 130 X shafts.
#5 - DUSTIN JOHNSON
Irons in play: TaylorMade P730 DJ Protos (4-PW) | True Temper Gold Tour Issue X100 shafts.
#4 - JUSTIN THOMAS
Irons in play: Titleist T100 (4) | Titleist 620 MB (5-9) | True Temper Dynamic Gold Tour Issue X100 shafts.
#3 - BROOKS KOEPKA
Irons in play: Mizuno JPX919 Tour (4-PW) | True Temper Dynamic Gold Tour Issue X100 shafts.
WATCH: Brooks Koepka's Mizuno Irons Review!
#2 - JON RAHM
Irons in play: TaylorMade P750 (4-PW) | Project X 6.5 shafts.
#1 - RORY MCILROY
Irons in play: TaylorMade P760 (3&4) | TaylorMade P730 (5-PW) | Project X Rifle 7.0 shafts.
