Size: Tube outer diameter 0.68 cm/0.27 inches, inner diameter 0.63 cm/0.25 inches; 2.13 cm/5.4 cm long; 7 mm drill bit required Beautiful Gifts: Use our carpentry car keychain kit, which is the ideal gift for friends and family or carpenters Exception: Please note that the packaging only includes woodworking turning kits, not lathes, shafts, drills, bushings and wooden blanks Features: Woodworking keychain kits are fun to make and look beautiful, you can use them as keychains yourself Whether you want to add something to your collection or make a special gift for yourself, our turning kits can provide you with unexpected and inspiring ideas. Specifications: Material: Metal Color: Silver Tube Size: Outer Diameter 0.68cm/0.27in Inner Diameter 0.63cm/0.25in 3.5cm/3.37cm Length Package Contents: 12 Pieces Woodworking Turn Keychain Kits Only the above package content, other products are not included. 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.