FOMON Ball End Retractors, with blunt ball ends

PM-5430* 6-1/4″ (15.9 cm), single prong, with blunt ball end
PM-5435* 6-1/4″ (15.9 cm), double prong 11 mm wide
PM-5381* 6-1/4″ (15.9 cm), double prong 13 mm wide, round knurled handle