1) Beam-type: A pointer beam is attached to the wrench head. As the wrench itself is "twisted" (that's what torque means, a twisting force), the beam stays in place, and the scale beneath the pointer moves to indicate the amount of twist, or torque, being applied. It is important that the handle, which "floats" is never locked against the sides of the wrench. It should always be floating when held, for an accurate torque reading.