The SP-7527 by SP Air Corporation is a 1/2-Inch Composite Air Drill with a durable, yet light weight composite body which can handle any job you require. The model features a double-gear mechanism with a free speed of 400 rpm. The weight is 2.9 pounds and 7-5/64-Inch in length. The unit has a has a chuck size of 1/2-Inch (13mm) and a 1/4-Inch air inlet. With SP Air’s SAS (Side and Side) forward/reverse system, you can easily switch directions with one hand.