300-10PCS Hammer Drive Expansion Rivets Percussion Expansion Aluminum Nail Head Piercing Knock Type Small Tapping Screw Fastener

Material: Aluminum alloy

Size: 5*7mm, 5*9mm, 5*11mm

Usage: Tap the upper part, and the lower part will expand after tapping

Applicable to: Furniture, cabinets, doors and windows, concrete, wood, etc

Package includes: 10/30/50/100/200/300* tapping expansion screws