Customized Pens, Caliper Pen - Construction Theme, Are you in the business of building and construction?Want to show your customer how you measure up? This silver caliper-shaped ballpoint pen makes the ideal promotional giveaway Use this pen an advertising tool at your next event Products are not intended for use by children or pets They may present a choking hazard to children under 3 years of age. ... #24359 $1.02/each.