Edge Folding Tools | Big Rock Supply

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Single Lock Seamers

A single lock seamer bends the edges of two metal panels together at a 90-degree angle, forming a single fold along the seam. This type of seam provides moderate strength and weather resistance. Single lock seams are often used in regions with milder climates, as they are easier to install and adjust. However, they may not be as effective in extreme weather conditions, as they are more susceptible to wind uplift and water infiltration.

Double Lock Seamers

A double lock seamer, on the other hand, folds the metal seam twice, typically at 180 degrees, creating a tighter and more secure connection. This additional fold enhances the seam's strength, making it more resistant to wind, water, and temperature fluctuations. Double lock seams are commonly used in areas with harsh weather conditions, as they provide superior durability and protection.

Key Differences:

Feature	Single Lock Seamer	Double Lock Seamer
Seam Angle	90 degrees	180 degrees
Weather Resistance	Moderate	High
Wind Resistance	Lower	Stronger
Installation	Easier, quicker	More labor-intensive
Best Use Case	Mild climates, low-slope roofs	Harsh climates, steep-slope roofs

A drip edge folding tool is used in metal roofing to create precise bends for drip edges, ensuring proper water runoff and preventing moisture damage. These tools provide accurate, uniform bends, are made from durable materials, and come in various types like hand seamers and edge benders. They help achieve a professional finish, improve water protection, and save time compared to improvised bending methods.

Best Sellers

Single Handle Metal Panel Hemming Tool

High and Low Side Bending of Metal Building Panels (15 1/4" - 20")

Price: $48.60

No more headaches associated with properly Field-Bending the high and low sides of metal building panels. Weather you want to Hem the low sides or Close the high sides, this is the right tool for you! Features: 15 ¼”- 1" Throat x ⅛” Gap17 ¼”- 1 ½” Throat x ⅛” Gap19”- 1 ½” Throat x 3/16” Gap 20”- 1 ½” Throat x ⅛” Gap Zinc-Chromate PlatedSingle Rubber Grip HandleLow Side HemmingHigh Side ClosingCommon Metal Panel Widths: 12",15",16",18"+ No More! Exposed FastenersIce DamagingRusty Panel...

ESE Machines, #001N First Stage Hand Seamer

For Single Locking Profiles that Measure 1/2" or 9/16" Across the Top

Price: $175.45

For Single Locking Profiles that Measure 1/2" or 9/16" Across the Top Single Lock Hand SeamerForms 90 degree bendFor hard to reach placesFor an entire roof or to start or finish a roofLightweight and easy to useUnique leverage designWill not scratch or peel paintCompatible on profiles measuring 1/2" or 9/16" across topFor a double lock 1/2", pair with ESE 099 Finish Hand SeamerFor a double lock 9/16", pair with ESE 099HD Finish Hand SeamerMade in the USAPlease Note: Seams approximately 7.25"...

Malco DEFT Drip Edge Folding Tool - 24 in.

Makes Up to 1-1/2" Deep Bends Along Drip Edge of Roofing Panel

Price: $81.95

Big 24-inch (61 cm) and compact 18-inch (46 cm) Drip Edge Folding Tools make quick bends along the drip edge of flat-pan standing seam metal roofing panels. Two rib-reinforced steel plates are permanently welded together to create two folding seams for making 1-inch (25.4 mm) and 1-1/2-inch (38.1 mm) deep bends in maximum 22-gauge (0.76 mm) steel. A two-post-design, fiberglass reinforced nylon handle offers durable, lightweight strength and high leverage for working overhead or on a bench....

ESE Machines, #001C First Stage Hand Seamer

For Single Locking the 1/2" Wide Standing Seam

Price: $188.95

For Single Locking the 1/2" Wide Standing Seam FEATURES Single Lock Hand SeamerForms 90 degree bendFor hard to reach placesFor an entire roofTo start or finish a roofLightweightEasy to useWill not scratch or peel paintThis tool is compatible on profiles measuring 1/2" across topFor a double lock, pair with ESE 099 Finish Hand SeamerMade in the USAMaximum gauges: steel (24 ga.), aluminum (0.032), copper (20 oz.) Please Note: Seams approximately 65" at a time. The pivot is 10" but there are...