The Irwin TM444S5 Blue Chip Chisels have high impact, square section blue plastic handles that have been radiused for a comfortable grip. The bolster fitted blades are manufactured from top quality carbon steel for maximum durability and long life. Their impact-resistant handle will absorb the occasional hammer blow although are designed for use with a mallet. The blade is hardened up to the last 25mm for long working life and annealed for an edge that is slow to blunt yet easy to sharpen. Features: Irwin Blue Chip Chisels have high impact square section blue plastic handle radiused for a comfortable grip. Bolster fitted blades are manufactured from top quality carbon steel. Bevel edged. Solid one-piece forged blade ensures structural integrity. The impact-resistant handle will absorb the occasional hammer blow. Designed for use with a mallet. Blades hardened up to the last 25mm for long working life and annealed for an edge that is slow to blunt yet easy to sharpen. Set contains 5 chisels:- 1/4 Inch - 6mm, 3/8 Inch - 10mm, 1/2 Inch - 13mm, 3/4 Inch - 19mm, 1 Inch - 25mm.