Drill Stop Collar Set G4021 Smooth running ball bearing

Smooth running ball bearing

Produces a high luster finish on all types of precious and decorative metals

Citgo Quenchol 521 is a highly stable quench oils designed especially for use in steel heat treating operations

and decorating techniques of pen knives

Drill Stop Collar Set G4021 Smooth running ball bearingTakes the guess work out of drilling! Simply slip the collar over drill bit; measure desired depth; then tighten set screw. Will drill to uniform depth every time. Steel collars will not slip like plastic stops. Slotted screws tighten into flute. Rust Proof plated finish. 7pc. set with one collar to fit these drill sizes: 1 8, 3 16, 1 4, 5 16, 3 8, 7 16, 1 2.