200 piece(100 spikes-100 screw's)Lot 3/8" Gun Black Spots Cone Screw Metal Studs Leathercraft Rivet Bullet Spikes Condition: 100% Brand-New. 7x10mm 3/8" Cone shaped Spikes with a round base This spike was formally called the 3/8 inch cone spike, this spike is shaped exactly like a cone, comes with a screw for application.