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The Benefits of Using a Thrusting Machine The major muscles in your back can be effectively worked with thrusting machines. They are also known as glute boxes and hip thrusters. They target the gluteus maximumus or butt, as well as hamstrings, and the core. The Buck is smaller and less expensive than other thrusting sex toy, which can cost up to $1,000. It also has a built-in safety feature that cuts off power to the motor wh