Some pocket safe, retractable tip pencils : r/mechanicalpencils
TWSBI Precision Mechanical Pencil - Retractable Tip - 0.5 mm - Black | JetPens
Amazon.com : ALVIN Draft-Tec Retractable Tip Mechanical Pencil 0.5mm Model DR05 Mechanical Pencil With Retractable Tip For Drafting, Architecture, Geometry, Art and School : Mechanical Pencils : Office Products