▶ 3 Pcs spiral step drill bits, 4-12/4-20/4-32mm 29 Sizes, A variety of diameter sizes of drilling, reaming, chamfering, deburring and drilling.
▶ Classic high speed steel, Titanium alloy coating reduces friction and they are more durable than uncoated drill bits.HSS(High speed steel) has a longer service life.
▶ Unique step structure, one drill can open various sizes of aperture, a ladder drill to a box bit.
▶ According to the need to process different diameter holes, you can achieve one-time processing of large holes, no need to replace the drill bit and positioning hole.
▶ Scope of application: automotive sheet metal, repair and modification, bridge doors and windows, home appliances.
Petansy Jeu de forets en spirale revêtus titane HSS à queue hexagonale à entraînement rapide Outils de poinçonnage en bois 4-12 20 32mm 3 Pcs B07K8DZL7D