It features a 1/2 inch universal shank. The S 522 BF Flexible for Metal Reciprocating Saw Blade is designed for use with compact saws. Its fine tooth pitch of 1.8 mm delivers fast cuts. Moreover, the BIM (bi-metal) blade is engineered for long lifetime when cutting regular-strength sheet steel. The fine tooth pitch also enables cutting sheet metal with thickness of 3 mm to 8 mm. Its short length (100 mm) enables a cutting capacity up to 50 mm and it is ideal for use with cordless compact saws.