This movement will benefit from you performing it slowly, try to drag out the length of each rep by lowering the barbell back down slowly each time.
A group of muscles on the outside and sides of your lower arm.
Barbell
Make sure to always use weight clips whenever you use a barbell, to prevent the plates from sliding off.
Flat Bench Without Rack
If you can't find this bench, consider using a flat bench with rack instead. If your exercise requires you to use a barbell or bar, you cannot substitute. If you do not need to use either, you probably can substitute.
Exercises that target the same primary muscle groups and require the same equipment.
Exercises that target the same primary muscle groups with different equipment