1 Impactor holder with retaining ring and ring magnet, 9 impactor bits. The impactor technology ensures above-average service life even under extreme conditions by making optimal use of material properties and by having a geometry that is perfectly adapted. Particularly suitable for use with standard impact and hammer drills. The holder with a ring magnet allows for easy handling of long and heavy screws, making it ideal for overhead work. The rough diamond coating on the bits reduces slippage from the screw due to increased friction resistance.