Hillman Heavy Duty Long Stem Steel Wheel Roller -Garage is the roller designed for most residential sectional garage doors. This long stem heavy duty roller features ten ball bearings, ensuring a long-lasting and smooth operation. With a 1-7/8" steel wheel, a 7-9/16" stem, and a 7/16" shaft, it is i for double hinge applications and helps guide the garage door seamlessly through the track system. The package comes complete with instructions, mounting hardware, and essential warning and safety information to ensure proper installation. Please note that incorrect installation or door positioning can cause serious injury or death, so follow the enclosed guidelines carefully.