 Eneroil’s Steelfabs brand Hinged Spiral Nail Stop Collars are available in the size range 4½" to 20", this device can be used in both upset and non-upset casing to provide maximum clearance during rotation. It has a groove in the middle into which a spiral nail can be driven for improved grip on the casing. the size range 4½" to 20", this device can be used in both upset and non-upset casing to provide maximum clearance during rotation. It has a groove in the middle into which a spiral nail can be driven for improved grip on the casing. |
