GreatNeck GF128 12 Inch 18 TPI Standard Hacksaw Blade 100 blade pack of 18 TPI standard hacksaw blades Flexible steel blades feature Hardened teeth for longer blade life Fits most standard 12" and adjustable frame hacksaws Recommended for cutting tool steel, iron pipe, light steel sections, and general shop work Shatterproof blade set is virtually indestructible