100X Hammer Drive Expansion Rivets Percussion Expansion Aluminum Nail Head Piercing Knock Type Small Tapping Screws Fasteners

Material: Aluminum alloy
Category: Screw
Dimensions: 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: 10/20/50/100PCS