Features:* Handle made of bearing steel.* High strength and hardness.* Wear-resistant and resistant to high temperatures.* Easy to use.* Durable to use.* Suitable for repairing bicycles, assembling furniture, making machinery, etc. Specifications:* Model: M3*0.5 / M4*0.7 / M5*0.8 / M6*1.0 (optional)* Material: Ball Bearing Steel * Size:M3: Length: Approx. 46mm/1.79", Head Diameter: Approx. 4mmM4: Length: Approx. 52mm/2.03", Head Diameter: Approx. 5mmM5: Length: Approx. 60mm/2.34", Head Diameter: Approx. 5.5mmM6: Length: Approx. 62mm/2.42", Head Diameter: Approx. 6mm* Quantity: 3pcs. Package Contents:3 x Hand Screw TapsNote:1. The actual colors 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.2. Please allow slight manual measurement deviation for the data.