Mechaid safety springs (also called Quick Release springs) are used to retain FLUSH and other large diameter rivet sets. The open end fits around the barrel of the rivet and holds it securely. Fits most rivet guns.
3/4" diameter by 5/8" long 30° angle Inverted Cone Shape Carbide Burr (Type SN). Double cut for quick material removal. 1/4" shank fits most die grinders. Manufactured from solid fine-grained Carbide for strength and durability.