Features: High precisionIt's split bushing converters for multiple purposes of chuck or collet sutability.Suitable for engraving machine, wood router. The steel router collet is easy to carry, firm, stable, has high precision and can improve your working efficiency. Carbon steel3 pieces/5 pieces trimming engraving machine collet chuck nut router bit shaft adapter woodworking.Collet chuck set is made of carbon steel which is strong, durable and can use for a long time. Use in wide rangeProcessing by heat treatment and precise grinding, durable to use.Used for chuck conversion of trimming, engraving machines.And also suitable for automobiles, molds and mechanical engineering. The router collet chuck is a perfect tool for you to use. With different sizes It can help you make better, more efficient and more durable processing products.The chuck can be converted into 6mm handles, 6.35mm handles and 8mm handles.The three specifications of chucks can meet your different needs. For engraving machine The router collet chuck is a tool installed on the milling cutter to fix the parts that need to be modified. It is widely used for chuck conversion of trimming, engraving machines. Collet chuck set is suitable for engraving machine, wood router etc. Specifications: Material: Carbon steel Color:Silver Type A:(2pcs 6/6.35mm Router Bit Collet,1pc Nut);B:(3pcs 6/6.35/8mm Router Bit Collet,2pcsNut) Size(about): Type A: bit collet:upper dia:11mm/0.4inch; bottom dia:7mm/0.3inch; height:8.4mm/0.33inch; hole dia:6mm/0.2inch; 6.35mm/0.23inch; nut:12x13mm/0.5x0.5inch(LxW); hole dia:7mm/0.3inch Type B: bit collet:upper dia:11mm/0.4inch; bottom dia:7mm/0.3inch;height:8.4mm/0.33inch; hole dia:6mm/0.2inch; 6.35mm/0.23inch;8mm/0.3inch nut:12x13mm/0.5x0.5inch(LxW); hole dia:7mm/0.3inch;8.5mm/0.33inch Package Included: 2pcs xRouter Bit Collet 1pc x Nut Or 3pcs xRouter Bit Collet 2pc x Nut Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 0.5-2 cm differences due to manual measurement.