What's inside? Titleist Brand Ambassador Gary Woodland's new Prototype MB irons.

Here's what they look like in the bag.

Marni Ines of Titleist Golf Club R&D looks on during Gary's first testing session.

Woodland plays Titleist Pro V1 golf balls.

A little further down the range, Titleist Brand Ambassador Ryuji Imada tests his new Prototype CB irons.

Ryuji games 4-9 MB irons with True Temper Dynamic Gold shafts.

Time to check some numbers on the launch monitor.

Ryuji chats with Titleist Tour Rep Chris Tuten about the new prototype irons.

Ryuji's previous set of MB irons takes a breather.

Titleist Brand Ambassador Marc Leishman cleans the grooves in his new Prototype MB 9-iron.