Feature: 1. Suitable Size: This spiral coil binding machine is suitable for letter size, A4 size and A5 size, you can easily set the paper margins of 2mm, 4mm, 6mm to build a professional looking piece. 2. Humanized Handle: The spiral coil binding machine adopts humanized handle and up to 12 or so sheets of paper can be punched at a time by applying steady pressure. 3. Binding Capability: Out wire binder machine can bind 220 sheets (70‑80g) and manual binding, according to the size of consumables can be bound more. 4. Made of Stainless Steel: Out wire binder machine is made of stainless steel material and can be with great wear resistance. 5. Multi Use: Wire binder machine binds with any 3:1 pitch and can be 3:1 pitch coil binding spine, 3:1 pitch click binding or 3:1 pitch binding ring. Specification: ​Item Type: Binding MachineMaterial: Stainless steel Maximum Punching Capacity in Single Time: About 12 sheets Maximum Binding Capacity: 220 sheets (70-80g) manual binding, according to the size of supplies can be bound more Applicable: For Letter Size, A4 Size, A5 Size, etc. Number of Holes: 46 (A4) Hole Shape: Diameter 4mm round hole, Approx. 4mm / 0.16in or 4 x 5.5mm oval hole, Approx. 4 x 5.5mm / 0.16 x 0.22in Hole Distance: Approx. 6.35mm / 0.250in, 6.29mm / 0.248in Margin Adjustment: Approx. 2mm / 0.08in, 4mm / 0.16in, 6mm / 0.236in. Package List: 1 x Binding Machine1 x Handle1 x Manual