Durable & Comfortable Structure - The shifter knobs with a comfortable smooth surface and great durable metal touch, easy to clean, pen shake knob helps for good driving habits, improves the driving experience, and manipulative sense. ,Durable & Comfortable Structure - The shifter knobs with a comfortable smooth surface and great durable metal touch, easy to clean, pen shake knob helps for good driving habits, improves the driving experience, and manipulative sense.