Jonard Tools - Combination Bellhanger Drill Bit - Wood & Masonry - 3/8" x 24" CodeLocks They are installed at the

They are installed at the top of a door opening

Designed with a nut on the base of the handle and a short head with a heavy duty weld

plus Four (4) IP Channels

Reflection Accuracy ±3dB

Continental: S180144904

Jonard Tools - Combination Bellhanger Drill Bit - Wood & Masonry - 3/8" x 24" CodeLocks They are installed at theDesigned to drill through wood and masonry walls for installing computer, security, phone, and cable small wire systems, this combination bellhanger drill bit eliminates the need to carry multiple drill bits with you, perfect for any installer. This bellhanger drill bit also features the following: Aggressive tip drills through wood, masonry, and other similar materials with ease Holes on the bit head and chuck allow for pulling of wires after