- High-performance rolled, steam-treated twist drill made from heavy- duty high speed steel. - The manufacturing procedure (no structural disruption) solidifies the material making it more elasticated. - This makes it more resistant to fracture and suitable for robust drilling units. (e.g. hand-held drilling machines)
For extracting poorly accessible valve shaft seals, e.g. in four-valve engines. Joint and jaws made of gun-finished hardened sheet steel. Handles made of nickel-plated shaped sheet steel.
Metric sizes: DIN 3124/ISO 2725-1, ASME B 107.5M, E DIN EN 3709, American sizes: ASME B 107.1, Fed. Spec. GGG-W-641, SAE AS 954-E (test loads), HPQ® high performance steel, chrome plated.