A pair of promising Chirs Waller-trained gallopers will look to continue their rise through the grades at Randwick when Studio and High On Believing contest the Cellarbrations Benchmark 85 Hcp.

The pair sit high in the market for Saturday's Cellarbrations Benchmark 85 Handicap (1600m) and loom as the main dangers to the Guy Walter-trained favourite Jacquinot Bay.

Exciting staying prospect Studio will look to keep his unbeaten record intact at career start number four.

The Political Force entire goes into the event off a dominant four length romp at Canterbury over 1550m on resuming.

“I think we will see the best of him when he gets over further but in saying that he will appreciate the big track on Saturday,” Waller Stable Representative Liam Prior said.

“He is a classy horse who is now three from three but this preparation the aim will be to step him through the grades opposed to looking at the feature races.

“Providing he continues to go through the grades this preparation we can sort of reassess our targets in the autumn.

“This prep will be all about taking him through the grades and earning some of the good prizemoney that is on offer in Sydney at the moment.”

While he may not have quite the boom on his as Studio, High On Believing will also be out to continue a winning streak after saluting at Rosehill last Saturday.

The four-year-old has hit the ground running since arriving at the Chris Waller stable having recorded three wins from five starts this campaign.

“He is a pretty smart horse,” Prior said.

“He showed on Saturday he has that ability when people probably underrated him. Getting onto a big track certainly suited him.

“He has come through that race last week remarkably well and I think he will take some beating on Saturday.”