CRIMPER 5 BLADE REDLINE

A 5 Blade Redline Crimper is a Malco-style sheet metal / HVAC duct crimping tool used to shape the end of round metal pipe or duct so it can slip into another piece.

🔧 What it is

It’s a hand tool with 5 crimping blades that press indentations into metal ducting (usually round galvanized pipe).

Most common version:

• Malco C5R 5-Blade Crimper (RedLine handle series)

⚙️ What it does

• Creates a reduced (crimped) end on round duct or stove pipe
• Allows one pipe to fit inside another pipe of the same size
• Produces a tight, factory-style connection for HVAC ductwork
• Helps prevent air leaks when joints are assembled

🧰 Why it’s called “5 blade”

• It has five hardened steel forming blades
• Each squeeze makes multiple shallow indentations around the pipe
• This creates a uniform “male end” on round duct

🔴 What “RedLine” means

• “RedLine” is Malco’s ergonomic handle design
• Features:
  • Non-slip grips
  • Spring-assisted action
  • Better leverage for repeated crimping