uxcell 100 Pcs 2mm x 4mm Aluminum Flat Head Semi-Tubular Rivets Silver Tone M2 x 4mm Size Name:M2 x 4mm M48mm-- 30pcs M55mm--30pcs

M48mm-- 30pcs M55mm--30pcs

the insect puzzle is powered by a metal spring

The wide end fits max 0

small variable teeths (like 12/16TPI

uxcell 100 Pcs 2mm x 4mm Aluminum Flat Head Semi-Tubular Rivets Silver Tone M2 x 4mm Size Name:M2 x 4mm M48mm-- 30pcs M55mm--30pcsuxcell 100 Pcs 2mm x 4mm Aluminum Flat Head Semi Tubular Rivets Silver Tone Descriptions: Semi Tubular Rivets (also known as Tubular Rivets) are similar to solid rivets, except they have a partial hole (opposite the head) at the tip. The purpose of this hole is to reduce the amount of force needed for application by rolling the tubular portion outward. The force needed to apply a semi tubular rivet is about 1 4 of the amount needed to apply a solid