Pen with Carabiner, Retractable Affordable Cheap Pen, Budget Pens 12 Pack Pens Silver/Translucent Blue, Black Ink. This handy carabiner pen fixes that problem by allowing you to clip it and carry it anywhere. A simple push with the thumb on the carabiner gate and you can snap it onto your belt loop, purse strap, backpack loop, or onto a lanyard. The plastic barrel measures 1/2" in diameter, and is silver at the top and blue at the bottom. Color : Silver/Translucent Blue. Writes with black ink. Overall length of the pen is 5 3/4".