Flexovit® 3/8"x1/4" SHANK Mandrel Adaptor for Die Grinder Wheels - Shannon Supply
Amazon.com: Die Grinder Cut Off Wheel Mandrel - 1/4" Die Grinder Mandrel with 3/8" Arbor Hole for High-Speed Cutting Durable Arbor Adapter Cut Off Wheel Mandrel for Cleaning and Polishing - Drixet :
Econo Cutter Mandrel | Keystone Industries
Amazon.com: Rotary Thread RTM7 Mandrel - Essential for Die Grinder Accessories & Cut-Off Wheels, 3/8" Arbor Hole & 1/4" Stem, Ideal for Holding Die Grinder Bits - Durable Metalworking Tool (1) :
Die Grinder Arbor (Mandrel) 1/4" & 3/8"
Drixet Cut Off Wheel Die Grinder Mandrel - Die Grinder Cutting Wheel Mandrel for High Speed Cutting Durable Arbor Adapter Cut