KUNTEC 4 Pcs Smoothing Pneumatic Air Hammer Pneumatic Chisel Bits Tools Kit

?Feature:??Hammer bits Tool for 150mm, 190mm, 250mm gun air hammer and gas shovel, handle diameter approx.10mm?Air hammer bit use for Tire Repair,Windpipe Pressure Seam Edge,masonry and concrete demolition,hard surface break up and chiseling?Manufactured with high hardness steel for necessary hardness and durability?Note: The air chisels need to be Installed in the Pneumatic Sewing Machine, and Connected with the Air Compressor for Using???Contents:??Extended Length Air Hammer bit: 180* 25mm / 7.08* 0.89 inch?2x Plane Air Hammer bits:?100 * 30mm/ 3.93* 1.18 inch?80* 35mm/ 3.14* 1.37 inch?Spring: 28* 26mm/ 1.10* 1.02 inch