Northern Tool offers the Ironton 1/4" Die Grinder 16-Piece Kit, model no. 48156, for $19.99. Coupon code "248527" drops it to $14.99. Choose in-store pickup to dodge the $6.99 shipping fee. That's $25 under list and the lowest price we could find. It includes a 25,000-RPM grinder with variable speed control, 10 grinding stones, two wrenches, 1/4" collet, and carrying case.