Cheston 20pc Drill Bits Set I 5 Wall, 13 HSS Metal, 2 Screwdriver Bits I Bits for 10mm & 13mm Drills I For Wall, Concrete, Wood, Metal, Plastic, Compatible with Bosch Ibell IN THE BOX: Size: HSS Drill Bit Set: 1.5 X 40mm, 2 X 49mm, 2.5 X 56.7mm, 3 X 60mm, 3.2 X 63mm, 3.5 X 70mm, 4 X 74mm, 4.5 X 80mm, 4.8 X 80mm, 5 X 86mm, 5.5. X 91.7mm, 6 X 93.6mm, 6.5 X 98.5mm. Masonry Drill Bit Set : 4mm X 75mm, 5mm X 85mm, 6mm X 100mm, 8mm X 120mm And 10mm X 120mm. 2 Screwdriver Bits (Dia 6.3mm) MATERIAL: HIGH SPEED STEEL Specialty Woodworking Bits, Masonry Bits, Auger Drill Bits Set. Suitable For: Wood, Wall, Metal, Alluminium, Plastic, Concrete HIGH QUALITY shoulder cutters with precise edges that produce tear-free holes. SCREWDRIVER BITS: Doublesided ph Screwdriver Bit have Perfect Magnetic Holding Strength that Reduces Slips for Drill Rotary Hammer. 1/4 inch quick-change shank fits drill chucks, impact drivers, adapters,extensions and bit holders. HSS BITS: The 13 piece HSS Metal Drill bits set is a perfect companion for Impact drills, ensuring maxiumum precision. There's Low risk of breakage thanks to excellent elasticity. The twist drill bits made of high speed steel can be used with all Power Tool brands. Use of coolant is recommended.