These plastic wheel chocks are durable yet light enough to take along when you travel. Series PWC, is made of 100% recycled plastic. Resistant to damage from sunlight, oil, salt, and chemicals. Features a molded-in handle with (2) two 1-3/8" thru holes. Holes will accommodate OH-15 chain attachment (not included). Model PLWC-Y, features a molded-in handle. Bottom surface includes three (3) steel cleats for extra traction. Series PWC-DS, features a dual slope. One side has a 45 degree slope while the other side has a 60 degree slope. 100% recyled plastic construction is chemical and sunlight resistant and delivers a strong grasp to a number of surfaces. Features one (1) 1-1/8" hole thru to accommodate OH-15 chain (not included) to assist in chock removal or transport. Series PEWC, are a Polyethylene wheel chock which helps maintain stability on uncertain surfaces. With a steady foundation, the chocks minimize the chance of movement or jostling. A lightweight design is perfect for carrying and transference from areas to area. With a bright design, the color promotes clear visibility. The chock is compact in size for minimal storage space when not in use.