Swanlake Punch And Chisel Set, Including Taper Punch, Cold Chisels, Pin, 16Pcs Available in 16 different shapes and designs, including: bolt hole alignment, ball head separation, unfolding knuckle, center punch, knockout bolts and pins. Heat treated chromium vanadium provides a high hardness rating that prevents rapid expansion of the head and passivation of the chisel and punch. 5PC Tapered punch: 3/32" x 5-1/4", 1/8" x 5-3/4", 5/32" x 6", 3/16" x 6-1/4", 1 /4" x 6-3/4" and 3PC Cold Chisels: 3/8" x 5-1/2", 1/2" x 6", 5/8" x 6-1/2" 5PC Punch: 3/32" x 4-1/4", 1/8" x 4-3/4", 5/32" x 5", 3/16" x 5-1/4", 1/4" 5-3/4" and 2PC Center punch: 1/8" x 5", 3/16" x 6" Product material: made of chrome vanadium steel, hardness: 54~58HRC