[Compact Design] Despite its sturdy construction this adapter remains lightweight at and measures only 1.8 inches in length. the space saving design adds minimal bulk (just 2.8cm to spindle length) while providing maximum functionality making it easy to store and transport between jobs. [Precise Engineering] Meticulously designed with exact specifications (40mm male and 30mm female thread) this adapter maintains perfect alignment for your wood turning projects. the precision crafted threads ensure smooth operation and consistent performance eliminating wobble or vibration during use. [Versatile Functionality] Acting as both a thread converter and spindle extender this adapter significantly expands your lathe's capabilities. it allows seamless compatibility between 30mm and 40mm threaded accessories while maintaining excellent stability giving you more flexibility in your woodworking projects. [Compatibility] This heavy duty lathe spindle adapter features a 30mm female thread for mounting spindle and a 40mm male thread for chuck ensuring seamless integration with standard woodworking lathes. the precise thread converter design allows you to easily connect different sized accessories without any compatibility issues making it perfect for both professional and hobbyist woodturners. [Sturdy Construction] Crafted from 45 steel alloy this spindle chuck reducer is built to last. the robust metal construction enhances longevity and resists wear even during extended use in demanding woodworking applications. its superior strength ensures project after project., Manufacturer: Jelquix