This listing is for the bosch pro t121 bfc thick metal cutting jigsaw blade in a pack of 5, a versatile choice for tradespeople who regularly work with sheet metal and want a reliable supply of blades close to hand. The larger pack size offers better value and ensures you won't be caught short mid-job. Each blade lasts up to 2x longer than a bosch t118b, thanks to its bi-metal construction combining a high-speed steel hss tooth strip with an altin coating and a high-carbon steel hcs body. The altin coating provides enhanced resistance to heat and oxidation, helping maintain cutting performance over extended use in demanding metal applications. Strong milled wavy-set teeth, a tapered body, and a thin kerf work together to deliver smooth, straight cuts through medium-thick sheet metal between 2.5 And 6 mm. Fits all t-shank jigsaws. Features and benefits: lasts up to 2x longer than a bosch t118b jigsaw blade bi-metal construction for strength and durability altin-coated tooth strip resists heat and oxidation for long-lasting performance milled wavy-set teeth, tapered body, and thin kerf for smooth cutting progress cuts medium-thick sheet metal between 2.5 And 6 mm fits all t-shank jigsaws specifications: cutting capacity: 2.5 6 Mm sheet metal pack quantity: 5 contents: pack of 5