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“The TPT Red Range 15 Lo shaft is Day’s Ping G410 LST driver isn’t something you see every day on Tour.”
“Driver: Ping G410 LST (Graphite Design Tour AD XC), 10.5 degrees”
7 more players cited with it, listed below.
Players who use this also use

Ping G410 Plus
also used by 2 of them

Ping G425 LST
also used by 4 of them

Ping G425 Max
also used by 2 of them

Ping G430
also used by 1 of them

Ping G430 LST
also used by 3 of them

Ping G430 Max 10K
also used by 1 of them
Photo credits
- Stewart Cink — AJGA, CC BY-SA 4.0
- Jason Day — Bryan Berlin, CC BY-SA 4.0