Back to the Product Catalog Safety Equipment Choose a Different Catalog Section... Building Materials Construction/Specialty Tools Specialty Equipment Rope and Webbing Safety Equipment Climbing Gear Lighting Pulleys and Zip Brake Block Signs, Safety, and Element Pre-Built/Custom Items Rescue/First Aid Games and Initiatives Publications Toys for Boys and Girls ----------------------------------------------------- Extreme Series Hardware Teams Kit     Units of Measurement Pounds and kilograms are units of weight measurement (i.e. mass under the influence of gravity). Foot Pounds and kiloNewtons are the correct measurement of the force it takes to break an object. The conversion formula is pounds force(lbf.) = kiloNewtons (kN) divided by .004448. Click here to return to the 'Building Materials' Product List.