Peerless-AV SF640P Universal Flat Wall Mount for 32 to 60" Displays Kupo KS300112 The RA1 repro arm features

The RA1 repro arm features four centering holes for the precise adjustment of the optional graduated stage and repro bellows

Inside the can is a ball that make contact with the pins when the case is upright

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and a nice tactile feel

Peerless-AV SF640P Universal Flat Wall Mount for 32 to 60" Displays Kupo KS300112 The RA1 repro arm featuresFits 32 to 60" Displays Supports up to 150 lb Up to 450 x 405 mm Mount Pattern Post Installation L R Shift UL Listed, RoHS Compliant VESA and OSHPD Approved The Peerless AV SF640P Universal Flat Wall Mount is designed to mount flat panel displays measuring 32 to 60" and has a maximum load capacity of 150 lb. It provides post installation lateral shift, which varies based on the distance between the display's mounting holes. Low profile design holds