Description: This 170 pieces strong high speed steel drill set is ideal for drilling most materials including aluminum and iron.This drill set is a comprehensive set of the most popular drill bits. The whole set comes in a sturdy case with a comfortable grip handle. This 170 pieces drill set is the ultimate must have for professional users as well as home DIY enthusiasts. Features: Drilling bits are made of high speed steel, high hardness and durable. Precision ground for clean cuts and easier fastening. 170 pieces drill bit complete set of the most popular drill bits. Ideal for most drilling jobs and materials such as aluminum, iron, wood, plastics. Comes in a sturdy case with a comfortable grip handle. Specifications: Material: HSS4241 Diameter: 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5 & 10mm Quantity: 170pcs Box Size: 35.9 x 24.7 x 3.8cm / 14.1 x 9.72 x 1.49" Weight: 4.05kg(approx.) Package Includes: 1 Box(170pcs) x Drill Bits Note: 1. Please allow 1-3mm error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard. Package List 1Drilling bits are made of high speed steel, high hardness and durable 2Precision ground for clean cuts and easier fastening 3170 pieces drill bit complete set of the most popular drill bits 4Ideal for most drilling jobs and materials such as aluminum, iron, wood, plastics 5Comes in a sturdy case with a comfortable grip handle