Simpson PT-MK1 Powder Actuated Tool Cleaning Kit Adapters & Bushings This is what makes it

This is what makes it suitable for direct panel-to-steel-stud fastening applications where a separate pre-drilled pilot hole would otherwise be required

What does "undersized" mean in the context of this #3 square bit

Tri-Lobe threads - grip composite and PVC decking securely

Side Stirrup Length (L2): 7 3/4 in

Simpson PT-MK1 Powder Actuated Tool Cleaning Kit Adapters & Bushings This is what makes itThe Simpson PT MK1 Powder Actuated Tool (PAT) Cleaning Kit is a purpose built maintenance solution designed to keep Simpson Strong Tie powder actuated tool systems operating at peak performance. This comprehensive kit provides everything necessary to perform routine cleaning on the tools, featuring a curated collection of brushes in multiple sizes along with a wrench to support thorough, proper maintenance of your powder actuated tools. Key Features