31982 Pneumatic 1"x 4" Hammer Bits are used in tire repair, automotive, metalworking, and other industries. 1"x4" Smoothing Air Hammer Bits: 2 Pcs The air hammer smoothing bit is made of high-quality chrome molybdenum steel material, corrosion resistance, high hardness, and impact-resistant. It can be used for a long time, bringing you much convenience daily. 31982 1x4-Inch Pneumatic Hammer Bit for Ingersoll Rand 114GQC 123MAXK Air Hammer, 119MAX Long Tube Air Hammer Kit, 123MAX Short Tube Air Hammer, 135MAXK Air Hammer. 24-Hour Customer Service - No matter your problem, we're always here to help and answer your questions.