Irwin 4935076 Percussion Straight Bit Set, 6", 5Pc/Pk Wall Repair Compounds a hardwood backer block and

a hardwood backer block and an assortment of grommets

or concrete block

Pressure switch setting: 30/50

no spill pipe joint compound

Irwin 4935076 Percussion Straight Bit Set, 6", 5Pc/Pk Wall Repair Compounds a hardwood backer block andHighlights: Bit Type: Rotary Drill Bit Size: Assorted Product Type: Percussion Bit Set Dril Bit Length: 6 in. Shank Type: Straight Application: Use with all types of impact and rotary drivers Packaging Type: Clamshell Material: Carbide Tipped Patented carbide tip controlled self centering when starting holes Patented flute design for rapid dust removal reduces clogging and increases penetration speed Short drill head forces drilling dust into flute