Item Model NumberWJD3405
Product DimensionsDrill bit diameters range from 4mm to 35mm depending on bit; shank diameter is 6.35mm (1/4 inch he x )
MaterialHigh-speed steel (HSS)
StyleStep/cone drill bits with progressive sizing and self-centering design
Power SourceManual
ColorBlue/Orange
Compatible ProductsUniversal 1/4 inch hex shank drills
Item Weight0.433–1.2kg
SizeDrill bit sizes 4–12 mm, 6–18 mm, 4–22 mm, 6–35 mm
Item Package Quantity5 pieces
CapacitySuitable for drilling holes in thin metals (up to 3 mm thickness), plastics, and sheet materials
Special FeaturesDurable construction with sharp cutting edges
Universal 1/4 hex shank compatibility
Designed for smooth operation with reduced vibration and minimal bit walking
Clean finish on drilled holes
Included Components1 x Step drill bit 4-12 mm (1 mm/step)
1/4 hex shank
1 x Step drill bit 4-12 mm (2 mm/step)
1/4 hex shank
1 x Step drill bit 6-18 mm (2 mm/step)
1/4 hex shank
1 x Step drill bit 4-22 mm (2 mm/step)
1/4 hex shank
1 x Step drill bit 6-35 mm
1/4 hex shank
Cutting capacity in WoodWood: 4–35 mm (varies by bit); Metal: suitable for thin metals (exact mm not specified)
Surface RecommendationThin metals, plastics, sheet materials
Spindle1/4 inch hex shank
ManufacturerNote: This product may be supplied under one of our available brands (Ingco, Wadfow, Gadiver, Dello), all sourced from a single manufacturer with identical technical specifications and functional performance. Any differences are limited solely to the brand name, colors, and external appearance, and apply only to the product in question and the brands listed above.
Warranty & SupportCheck Osta Warranty Page
Return PolicyOsta Return Policy
Properties5-piece step drill bit set, sizes 4-12mm (1mm step), 4-12mm (2mm step), 6-18mm (2mm step), 4-22mm (2mm step), 6-35mm step drill bits, sharp cutting edges, reduced vibration and bit walking, durable construction, 1.2 kg weight, 1-year manufacturer warranty
Country of OriginChina