... stable cutting and finish of holes.2. Additional one hole on the shank of cutters ≤Φ40mm, fit arbors with ... as quick-change system.3. Applicable to hole cutting and process of annular groove on various magnetic drills and press, ... the hole of steel component, such as steel structure project, railway traffic, bridging, shipbuilding, machine manufacture, aviation and spaceflight. HSS annular cutter