1. Top Material: Metal drill body, high-strength metal drill bit. They're tough, long-lasting, and resistant to wear. This pin vise and sharp drill bit set can be used for DIY hobbies without worrying about breaking. 2. For Mini Drills: This pin vise handle is made to hold tiny twist drill bits securely, with a clamping range of 0.3mm (.0135inch) - 1mm (.0390inch). It grips tightly and won't slip for precision. 3. Small & Precise: These micro-drills are tiny and suitable for drilling small, precise holes. They provide clean, smooth cuts. 4. Pin Vise: 115mm x 10mm. Drill Bits are numbered 61-80. These different sizes suit various DIY projects. Please check the size before buying! 5. Size Detail: #61(.0390inch) #62(.0380inch)#63(.0370inch)#64(.0360inch)#65(.0350inch) #66(.0330inch)#67(.0320inch)#68(.0310)#69(.0292inch)#70(.0280inch) #71(.0260inch)#72(.0250inch)#73(.0240inch)#74(.0225inch)#75(.0210inch) #76(.0200inch)#77(.0180inch)#78(.0160inch)#79(.0145inch)#80(.0135inch) 6. Colour: As Shown 7. Material: Metal 8. Package Contents: 20 x Drill Bits, 1 x Needle Vise. Only the above package content, other products are not included. 9. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.