Patent ID: 9089901
Filing Date: 2015-07-28
Classification: B23B,Y10T

Abstract:
1. An extension assembly configured to permit a user to drill a hole through inaccessible areas in a wall, comprising: (a) a flexible, solid core rod having first and second ends, the rod being configured to extend through a hole in a wall cavity and flex therein to position a tool bit at an inaccessible location in the wall cavity and permit a user to drill a hole through a substrate at the inaccessible location; and (b) a holding means secured to the second end of the rod for releasably holding a tool bit for rotation with the rod, the holding means including a sleeve adapted to slide axially along a body of the holding means between a secured position where a tool bit is securely held within the holding means and a release position where the tool bit is released from the holding means, wherein the sleeve includes a reduced-diameter chamfer disposed in abutting contact with a shoulder portion of the body, the chamfer created by deforming an end portion of the sleeve over the shoulder portion of the body to retain the sleeve axially along the body.