1This is a set of split bushing converters for multiple purposes of chuck or collet sutability 2Adopted high quality springsteels material, it is of good flexibility and wear resistance 3High precision, tight and stable clamping offer much convenience of workings 4Comes with 9 pieces of various sizes of adapters, so they are applicable to different specifications of the bit tool and chuck 5Suitable for engraving machine, wood router. A perfect woodworking toolFeatures:This is a set of split bushing convertersfor multiple purposes of chuck or collet sutability. Adopted high quality springsteels material,it is of good flexibility and wear resistance. High precision, tight and stable clampingoffer much convenience of workings. Comes with 9 pieces of various sizes ofadapters, so they are applicable to different specifications of the bit tooland chuck. Suitable for engraving machine, woodrouter. A perfect woodworking tool. Specifications: Material: Springsteels Outer Diam. - Inner Diam.: 1 2.7- 6.35mm,1 2.7-6mm, 12-6mm, 12-8mm, 12-10mm, 10-8mm, 9.5- 6.35mm, 8-6mm, 8- 6.35mm Weight: Approx. 90g Package Included: 9 * Chuck Collet Adapters Our products are made with the splendid quality materials and are designed to provide you with the best possible user experience.