Rhino 6' Carpenters Inside Reading Folding Ruler, 55145 Safety & PPE/Protective Sleeves They are then covered with

They are then covered with beeswax to help keep the dirt off

Programmable unique 6 digit ID: Considering the rugged environment these H2S monitors are often exposed to and used in

Excellent knot holding ability

Convenient push-button reset

Rhino 6' Carpenters Inside Reading Folding Ruler, 55145 Safety & PPE/Protective Sleeves They are then covered withRhino Ruler 6' Carpenter's Inside Reading Folding Ruler Rhino 6' Carpenters Inside Reading Folding Ruler is waterproof and wear resistant. Folding rulers have been used since the 1800s and are still used today. Invented to measure things high or far away, folding rulers stay rigid when measuring short and long distances.