CH01 RotoZip Steel Chuck Adapter Kit CH01 RotoZip Steel Chuck Adapter Kit allows the use of 1/8” Zip Bits in tools that normally accept 1/4” bits such as routers and laminate trimmers. CH01 RotoZip Steel Chuck Adapter Kit features the option to tighten the adapter in your 1/4” collet to use 1/8” router bits and kits include check adapter, hex key for securing bits and 2 rotary bits.