Punch four lacing holes in one shot with this 4-in-1 punch. 1.5mm (1/16") hole size with 6mm (1/4") gap. Best for 1.2mm (3oz.) to 1.6mm (4oz.) leather. Hole size could vary depends on leather thickness. Replacement cutting tubes also available. Always use against a cutting board or thick leather to avoid damage to the blade, and strike with a mallet, not a hammer.