A kit (100) for use in performing joint arthroplasty on a head of a long
bone (4) is provided. The kit (100) includes a first trial (102)
including a first trial articulating surface (106) and an opposed first
trial mounting surface (108) having a first trial location feature (110).
The kit (100) also includes a second trial (104) including a second trial
articulating surface (112) and an opposed second trial mounting surface
(114) having a second trial location feature (116). The first trial
articulating surface (106) and the second trial articulating surface
(112) have different geometries and the first trial location feature
(110) and the second trial location feature (116) have substantially
identical geometries whereby different trials may be used with a common
location feature.