Stanley 16-228 Center Punch, 5/16 Inch Ideal for marking metal or making indentations for starting drill holes One-piece construction forged for strength Hardened, quenched and tempered for long life and durability Powder-coated finish for easy visibility Used for marking metal or making indentations for starting drill holes One-piece construction forged from tempered tool steel for strength Hardened and tempered for long life Limited Lifetime Warranty