ITEM NAME:1X(2Pcs High Precision Collet Chuck Set 6.35Mm 8Mm Engraving Trimming MachiC8K3) 1X(2Pcs High Precision Collet Chuck Set 6.35Mm 8Mm Engraving Trimming MachiC8K3) 1X(Number of Jaws: 3 Power: Electric Model Number: Collet Chuck Brand new Fine workmanship and stable performance. High strength and hardness. High precision and durable. Make you better, more efficient to process products. Suitable for automobile manufacturing, mold manufacturing, machinery manufacturing etc. colour:Photo Color material:metal size:Big head diameter outside: approx. 12.35mm, 12mm Small head outside diameter: approx. 10mm, 10mm Hole diameter: approx. 6.35mm, 8mm Overall length: approx. 20mm,16.5mm Package Contents: 2 x Collet Chuck)