Diablo DHS375XT18 18" x 3/8" Universal Extension Network & Cable Testers 2 of the wheels are

2 of the wheels are lockable to secure a safe and fixed position

Also available as a paste

smooth and clean cut

Soft rubber bumper

Slip-resistant rubber-tipped temples and nose piece

Diablo DHS375XT18 18" x 3/8" Universal Extension Network & Cable Testers 2 of the wheels areDiablos Universal Extensions provide access in hard to reach areas by extending the length of your power tool accessory. No tools are required with this extension in order to attach accessories, the quick change feature allows users to switch between accessories with no down time. These extensions are ideal for use with Diablos Snap Lock Plus Hole Saw Mandrel. Features: Extend reach in hard to access areas Ideal for Diablo Snap Lock Plus Hole Saw