3M High Strength Small Hole Repair Kit includes all necessary tools for a interior small hole repairs up to 3". Kit includes 3" putty knife, primer enhanced spackling compound, 4" drywall repair screen and sanding pad.3M High Strength Small Hole Repair Kit includes all necessary tools for a interior small hole repairs up to 3". Kit includes 3" putty knife, primer enhanced spackling compound, 4" drywall repair screen and sanding pad.