[DETAIL] 1. Drilling can be started easily without pre-drilling. Drilling speed is fast and friction is extremely low. 2. It is widely applicable to all kinds of metals, plexiglass and hard plastics. 3. It is very suitable for home diy and general construction and engineering. 4. Use with needle vice or low-speed drill (not applicable to impact drill). 5. Application: High speed steel drill bit set for wood, plastic and aluminum. Ideal for diy, home and general building/engineering use. Specification: Finish Type:Gold Material:High Speed Steel Shank Type:Hex Tool Flute Type:Spiral Product description Material: High Speed Steel Color: Gold Coatingl Uses: Drilling holes made of aluminum, iron and other materials. Size: 16x1.5mm Twist Drill Bit 16x2.0mm Twist Drill Bit 15x2.5mm Twist Drill Bit 10x3.0mm Twist Drill Bit 10x3.2mm Twist Drill Bit 8x3.5mm Twist Drill Bit 8x4.0mm Twist Drill Bit 3x4.5mm Twist Drill Bit 3x5.0mm Twist Drill Bit 2x5.5mm Twist Drill Bit 2x6.0mm Twist Drill Bit 2x6.5mm Twist Drill Bit 2x8.0mm Twist Drill Bit 2X10.0mm Twist Drill Bit Product size(bag):134*58*35mm Product size(box):216*199*39mm Package included: 99pcs Twist Drill Bits 1.Transition: 1cm=10mm=0.39inch. 2. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 3. Please allow slight manual measurement deviation for the data. [ATTRIBUTES] - Hign-concerned Chemical: None - Type: Hand Tool Parts - Origin: Mainland China - Hign-concerned Chemical: None - Type: Hand Tool Parts - Origin: Mainland China