Callaway Quantum Max OS Irons (5-PW, AW, Steel)

The Callaway Quantum Max OS is the oversize, most forgiving iron in Callaway’s Quantum line, with heavy offset that helps golfers who slice.

Why it made the list

A slice and a weak, thin iron shot often come from the same swing. The Quantum Max OS goes after both. Its oversize head and extreme perimeter weighting keep mishits stable, and 4.80 mm of offset in the 7-iron gives the face more time to square up before impact.

Callaway pairs that with a two-piece cavity and a fully exposed 360 degree undercut, which lets the face flex more for ball speed and launch across a bigger area. Independent Golf Reviews classes it as a super game improvement iron.

What it does well

• Fights a slice with heavy offset that runs from 5.89 mm in the 5-iron to 4.80 mm in the 7-iron
• Holds ball speed on mishits thanks to the undercut cavity and an Ai shaped face
• Gets through the turf on heavy strikes with a Progressive Tri-Sole
• Feels softer on thin shots because urethane microspheres absorb vibration

The set also includes an approach wedge, so you don’t need to buy a gap club right away.

Who it’s for

Buy it if your common miss is a slice, you shoot in the mid 90s or higher, and you like a big head behind the ball. It suits golfers who struggle to get irons in the air and want a Callaway set for under $1,000. Left-handed golfers can buy the same set.

Who should skip it

Skip it if you already hit a draw, because the offset can turn it into a hook. Faster swingers who hit the ball high may find the flight too tall. Golfers who want a clean, compact look at address will find the head and topline bulky.

Key specs, explained

This listing is seven clubs, 5-iron to AW, with True Temper steel shafts in regular flex, for $999.99. The 7-iron is 29 degrees and 37.25 inches long. The pitching wedge is 42 degrees and the AW is 47 degrees, so a 52 degree gap wedge or similar is a natural next club.

Callaway also offers an HL spec that adds two degrees to every club, making the 7-iron 31 degrees. That suits golfers whose shots come in low. Graphite sets with True Temper Denali Frost Silver or Mitsubishi Vanquish shafts are listed too, at a higher price.

How it compares

The PING G740 Irons (5-PW, Steel) are a little more forgiving on thin shots and offer power and retro lofts, but cost more per club. The Callaway Quantum Max Irons have a cleaner, smaller head for golfers who make better contact. The OS is the Callaway pick for a slice.

Good to know

The price at Golf Discount was $999.99 for the right-handed regular flex steel set. Some flex and hand combinations are listed out of stock, so check your exact build before you order. Callaway’s spec chart also lists women’s lengths.

Questions about the Quantum Max OS

What does OS mean on Callaway irons?

OS stands for oversize, the largest head in the Quantum family. It is built for maximum forgiveness and easy launch.

How much offset does the Quantum Max OS have?

The 7-iron has 4.80 mm of offset, and the 4-iron has 6.35 mm. Offset tapers to 1.12 mm in the sand wedge.

Is there a high launch version?

Yes, the HL spec adds two degrees of loft to each club, so the 7-iron is 31 degrees instead of 29.