THE 16 biggest, fastest and most skilful men-mountains in rugby will look to obliterate each other in a human wrestling match as England take on New Zealand in the scrum.
And the front eight is where it could well be won or lost and the defending double world champions have a 9kg advantage over the English, with the Kiwi forwards tipping the scales at 929kg.
The Red Rose and All Blacks have two huge scrummaging units — but thankfully these giants are supremely talented in other areas of the rugby pitch too.
And the scrums promise to be incredibly close in the World Cup semi-final showdown.
New Zealand's tight five — the front and second rows — include Joe Moody (124kg) at loosehead prop, Codie Taylor (110kg) at hooker and Nepo Laulala (125kg) at tighthead.
Then 6ft 7in Brodie Retallick (120kg) drives alongside 116-cap Sam Whitelock (119kg) in the second row.
It is a hugely experienced and effective unit, backed up by 125-cap skipper Kieran Read at No8, one of the biggest names in world rugby.
Boss Steve Hansen has added weight to the front eight by taking out flanker Sam Cane and bringing in Scott Barrett as blindside flanker.
Doing so has added an extra 12kg to the scrum — and appears to be designed to stop England's biggest weapon: Billy Vunipola.
The Red Rose No8 could be a front row and is the heaviest player in the scrum… even though he is in the back row.
But he is also a nightmare for opposing teams when he picks the ball out of the back of the scrum and runs it himself.
His brother Mako Vunipola (123kg) IS in the front row for this massive encounter, while Jamie George (109kg) is between Mako and Kyle Sinckler.
England may not have considerable weight in 116kg Sinckler, but they do have huge power from the 6ft tighthead prop.
Then there is Maro Itoje, one of the hottest properties in world rugby, ready to go toe-to-toe with the team he faced with the British and Irish Lions on tour in 2017.
CROUCH, BIND, SET
He starts alongside Courtney Lawes, while Tom Curry and Sam Underhill bring youth to the pack.
In open play, the flankers have been energetic and hungry in defence, while Curry's long reach has made him a turnover machine in the ruck.
Credit: Sun Graphics
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Expect changes to come around the hour mark, particularly in the front row for both teams.
And if one team can win over the referee's favour, especially during a scrum in the opposing half, it throws up the chance for a huge three points.
On such margins are tight games won and lost.
Ben Youngs will feed an England scrum who will look to out-power their heavier opposing pack
The All Blacks scrum wreaked havoc on the Springboks unit back on the opening weekend of the tournament
All Blacks captain Kieran Read might be a nice guy off the pitch, but his forward pals are menaces in the scrum