7 Piece HSS 5 Flute Drill Bit Set for Wood Screws, Chamfering Bits for Various Length Screws by Simply Loosening and Tightening the Screw, 3-6mm Tool Set

Material: Made of HSS 4241 Material: Black. Chamfer drill body material: #45 steel Bevel: Single 90-degree bevel Quality: Heat-treated and hardened carbon steel with a titanium nitrate coating for superior cutting power Application: Use on steel, aluminum, plastic, and wood. The drilling length can be adjusted for different situations simply by loosening and tightening the screw. Dimension: 3mm (Dia) x 60mm (L) 4mm (Dia) x 75mm (L) 5mm (Dia) x 85mm (L) 6mm (Dia) x 93mm (L) 7mm (Dia) x 10mm (L) 8mm (Dia) x 11mm (L) 10mm (Dia) x 12mm (L) Features: 1, made of HSS drill bit 4241 2, Black Chamfer Drill Body: #45 Steel 3, 90 degree single flute edge chamfer 4. High-carbon, heat-treated and hardened steel with a titanium nitrate coating for superior cutting power 5. Suitable for use on steel, aluminum, plastic, and wood. The drilling length can be adjusted for different situations simply by loosening and tightening the screw.