Abstract: Systems and methods for providing real-time dynamic pricing information for a product based on receipt of a price queries from consumers at point-of-sale. The system receives price queries for a product provided by a consumer at point-of-sale by way of use of a mobile communicating device such as cellphone. The system maintains a database of received price queries. A preset price query threshold value associated with the product is retrieved in response to a received query. A price query count is extracted for the product, the price query count being the number of price queries generated in a predefined sample period. A product price is calculated in real time based on a comparison between the price query count and the threshold values. The consumer may be provided with discounts or coupons based on marketing campaign parameters derived from the price query.

Abstract: A bit body with a mount having a leg that extends along the rotational axis of the bit, a journal with a wedge shaped end secured to a wedge shape opening in the leg. A wedge on the journal has a fastener hole to register coaxially with a fastener hole in the leg and receives a fastener to secure the wedge on the journal in the wedge shape in the leg. One side of the wedge shape is generally perpendicular to the bit axis, and the adjacent side of the wedge forms an acute angle with said perpendicular side. The acute angle is in a range of about thirty to sixty degrees, ideally about 35 degrees.