Patent ID: 8657029

Claim:
A portable power tool, comprising: a prime mover that rotates a tool; and a housing that rotatably supports the tool and houses the prime mover, the housing including: side faces; a back-end face that is arranged on an opposite side from the tool and configured to allow a user to grip the housing from a back end of the housing; and a back-end groove that extends from a back end of one of the side faces to a back end of another one of the side faces across the back-end face and configured to allow the user to place a web between a thumb and a forefinger of a hand of the user into the back-end groove when the user grips the housing from the back-end face, wherein a depth of the back-end groove increases from the back end of the one of the side faces and from the back end of the another one of the side faces, toward the back end of the housing, the depth of the back-end groove being a distance from a tip of an upper rim, which is located above the back-end groove, to a deepest portion of the back-end groove in a plan view.