The hardened stainless steel construction with straight design ensures fast chip removal and extended durability, maintaining sharpened cutting through ceramics, glass, and aluminum Perfect for enlarging plumbing holes in marble countertops, trimming rough edges at glass tabletops, or creating clean recesses for screws in wooden furniture projects Engineered with coated edges and three precisions size ( 20mm / 35mm / 50mm), this multifunctional step drill bit handles, granites, wood, and metal while creating smooth beveling holes Ideal for woodworkers, installers, and metal fabricators requiring professional hole shaping tool for cabinetry, countertops installations, or home renovations Its great depth marking and antislip design make great control when chamfering existing holes, workshop result, Manufacturer: XAGMODSHN