Should be compatible with most 1" wide rulers and 6" Calipers
Wall Bracket to hang a 1" wide metal ruler and 6" Calipers
Uses 2 - 3mm x 10mm magnets for a secure hold
Super Glue 2 - 3x10mm magnets (1 ea.) in the two 10.5 mm depressions
The author hasn't provided the model origin yet.