"Rescue" and "hybrid" are terms that are virtually interchangeable. A hybrid club is one that is made with features from both fairway woods and irons. These are used to get you out of difficult lies when you still want plenty of distance. Hybrids are often called rescue clubs because they are intended to "rescue" you from these difficult lies.
Rectangular Construction Principle is used in the stainless steel club head of the HQ 7 golf clubs. This technology uses a square shape in the club head to give you the maximum moment of inertia, which gives you a higher launch angle. It also distributes the weight to the perimeter of the club head, which reduces the amount of vertical and horizontal twisting in the head when hitting the golf ball. This will make your shots straighter even when hitting the ball slightly off-center.
The HQ 7 Square 21 has a 21-degree angle of loft. The HQ 7 also is available with three other loft angles: 15 degrees, 18 degrees and 24 degrees. HQ 7 clubs with a stiff flex shaft are only available in 21 degrees and 18 degrees.
The shaft of the HQ 7 clubs are made of a high modulus graphite, which is a material made of special fibers covered in resin and wrapped together to shape the shaft. Flex refers to how much the shaft will bend when swinging the golf club. This club has a stiff flex rating, which means it will flex less than a regular shaft. A stiff flex shaft is usually recommended for golfers with faster golf swings.
The HQ 7 clubs come with a grip that is designed to be used in any weather conditions. They also come with their own head covers, which are designed to protect the club heads from being damaged when they are in a golf bag or in storage.