3-1/2" Conduit Punch And Die For Hydraulic Knockout Driver - 4.04" Actual Hole Product Details The punch and die are made of hardened tool steel with a black oxide finish, providing durability and corrosion resistance. They are designed to punch holes in various materials, including steel, stainless steel, brass, copper, aluminum (soft alloys only, not for use with 6061, 7075, and other super alloys), fiberglass, plastic, and more. Conduit Hole Size: 3-1/2" Conduit Fitting Size: 3-1/2" Actual Hole Size: 4.04" Dies have laser engraved alignment marks for easy and precise positioning. STANDARD THREAD - Fits Draw Stud Size: 3/4"-16UN Punching Thickness Capacity: 1/8" (10 ga) Steel, 1/16" Stainless Steel They are designed to punch holes in various materials, including steel, stainless steel, brass, copper, aluminum (soft alloys only, not for use with 6061, 7075, and other super alloys), fiberglass, plastic, and more. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.