Remington 491 operating instructions Never make fastenings in spalled or cracked areas

Safety Precautions

2. Never attempt to drive power fasteners into very hard or brittle materials including, but not limited to cast iron, glass, tile, stone, brick, or hardened steel. Materials of this type tend to shatter and create hazard from flying particles.

3.Never make fastenings in spalled or cracked areas.

4.Never drive power fasteners into thin or easily penetrated materials unless it is backed by concrete or steel. When in doubt, such as when base material is concealed, conduct a Center Punch Test (See page 6). Check continually to avoid fastening into unsuitable material, especially in older buildings.

5.Do not fasten through or within 1/2" of predrilled or pre-punched holes.