Professional Paintless Dent Removal Knockdown Tip Black Magic Material is soft enough to not harm the finish yet hard enough to last a super long time. Long Lasting and Non-Marring - The professional's everyday, multi-purpose, super hard knockdown and blending tip - Economical, accurate, durable and non-marring - Gets the job done easily without damaging the paint. The secret is our Black Magic material. - Engineered incorporating our O-Ring Groove (patent pending) that reduces wiggling and provides better control - Perfect for use with all Edgy Tool knockdowns - Uses industry standard threads for use on tools you already own