I have ordered RCK-351 Replacement MDF blade with 28 x 12 x 1.5mm V-groove carbide insert for RC-1102 I have a package with marked RCK- Received 51 with a sticker on the back saying it was RCK-351. Not so. Looking at Amana what RCK-51 actually is it's a bullet point knife, not what I ordered, not what the box says, not what the box says, nothing fits together :) Overall I have always been very happy with the service from RouterbitWorld, I hope they are doing everything right. But I will send it back, I hope you believe that what I send back is what you actually sent me.