Dealmonger: Weldon Four-Piece Countersink Set $35
Eagle America is selling this four-piece set of Weldon 82-degree countersinks for $35. They’re “zero-flute,” which means the cutting edge is produced by a hole running through the tool. They never chatter and tend to self-center much better than multi-flute countersinks. Around the shop we often use them to debur a hole after drilling.
Weldon Four-Piece Countersink Set [Eagle America]
Street Pricing [Google Products]
For the same price you can buy a 5 piece set:
http://www.jlindustrial.com/WEC-99650A/SEARCH:POPULAR/product.html