Proxxon 28056 HSS Jigsaw Blades. 

Pack of 2.

57mm x 2.9mm x 0.6m

Tooth pitch of 1.5 mm with teeth set and ground.

Useable on metals, especially aluminium and softer alloys, fibreglass, plexiglass and insulating materials.
These blades are for the Jig Saw STS 12/E
No 28 534