Dayree 60pcs Twist Drill Bit Set 1mm-3.5 mm Titanium Coated High Speed Steel Micro Drill Bits for Angle iron, Wood, Plastic, Steel and Aluminum Alloy Copper Steel

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About Dayree 60pcs Twist Drill Bit Set 1mm-3.5 Mm

Features: 1. Mainly for thinner, low hardness of wood and soft metal hole processing, for high hardness stainless steel and other materials can not be processed 2. Surface Titanium Coated: Increase the hardness of the drill bit, Strengthen heat dissipation, make bit more wear-resisting 3. The drills are smoothed and the coating, these drills are evenly and sharply, HSS steel fast and durable Material: High Speed Steel 4241 (HSS4241) Surface Treatment: Titanium Coated Application: metal, wood, plastic, PVC and other handicraft industry drilling, high precision, improve efficiency Package Included: 10 x 1.0mm Drill Bit 10 x 1.5mm Drill Bit 10 x 2.0mm Drill Bit 10 x 2.5mm Drill Bit 10 x 3.0mm Drill Bit 10 x 3.5mm Drill Bit Total Quantity: 60pcs How to use : 1. Ensure the left and right cutting edges of the drill are symmetrical when drilling. 2. Observe the uniformity of the spark while drilling, adjust the pressure in time, and pay attention to the cooling of the bit. 3. Use 1 mm and 1.5 mm drill bits with pin vise to avoid breaking, use 2 mm to 3.5 mm bits with power drill but only in low speed and low drilling pressure Note: 1. This drill bit set can not be used in the impact drill 2. To avoid drill bit break, 1mm and 1.5mm bits should be used with pin vise 3. 2mm、2.5mm、3mm bits can be used with power drill, with low speed and low drilling pressure