This item fits specific Polaris models including:
2016 & Up RZR 1000's (2&4 Seater)
All General Models (2&4 Seater)
2016 & Up RZR 900
2017-2018 Ranger XP1000

Double Splined Shaft Only - See picture for reference. 

Requires 53T High Gear & 67T Low Gear (sold separately if needed)

Replaces these OEM #'s
3235763
3235838
3235953
3535754
3235764

Required 53T High Gear - OEM # 3235234

Required 67T Low Gear - OEM # 3235232