Specification Brand : KIMISS BulletPoint1 : The punches are designed to enlarge one end of copper tubing to make a connection without a fitting. BulletPoint2 : The punches are designed to enlarge one end of copper tubing to make a connection without a fitting. BulletPoint3 : The punches are designed to enlarge one end of copper tubing to make a connection without a fitting. BulletPoint4 : The pin punches are made of high alloy steel, heat treated for strength and durability. BulletPoint5 : The pin punches suit for soft copper, brass, aluminum and thiNwalled tubes. ItemName : 5 Pcs Swaging Punch Kit CT193 Alloy Steel Swaging Tool 1/4~5/8in for Copper Aluminum Professional Accessories ItemPackageDimensions_Height : 3 centimeters ItemPackageDimensions_Length : 14 centimeters ItemPackageDimensions_Width : 11 centimeters ItemTypeKeyword : hand-tool-pin-punches Manufacturer : KIMISS ModelNumber : KIMISS0do3tipecn PartNumber : KIMISS0do3tipecn ProductDescription : 1. For soft copper, brass, aluminum and thin-walled tubes. 2. Hex design for easy extraction and . 3. Accurately machined for easy forming. 4. High alloy steel, heat treated for strength and durability. 5. Extend copper, brass or aluminum tubes to connect and extend tube length.