Special promotional offer, while supplies last!!When you buy 20 of DW8904Combo and 10 of DWA8280HRT you will get 30 wheels and receive the Grinder Item DWE402 at No Charge that is absolutely FREE!! 41/2" 11 Amp angle grinder. Next Generation 11 Amp AC/DC 11,000 rpm motor provides the best power to weight/size ratio available.