Sort by popularity Sort by latest Sort by price: low to high Sort by price: high to low View: 12 24 All Quick View Quick View Lighting / Inspection Tools, Products and ManualsHole Punch $5.00 This hole punch has a 1/4 " diameter so that you can punch out the date and whether the cylinder is compatible with air/nitrox or pure oxygen on your CTS Stickers.Add to cart