The trac razor is for those who prefer twin blade systems with a fixed head or pivoting head, and it is cleverly designed to accept twin blades by Merkur, Schick, Wilkinson, Gillette, Sensor or Protector. Blades can be used in a fixed position by sliding the blade cartridge in from the side, or attach one of the 3 adapters to use the cartridge in a pivoting position. This is truly one of the most versatile razors on the market, easy to use, a superb performer, and much more forgiving than most other razor types. In fact, with fixed head and Merkur twin blade cartridge attached, the Trac will satisfy both novice and experienced shaver.