Steelman Pro locking lug nut master key set 16-piece — thin-walled extra-long keys, chrome vanadium case

The Steelman Pro 78537 is a 16-piece master locking lug key set engineered to remove most aftermarket locking lug nuts quickly while protecting wheel finishes.

When a wheel lock key goes missing, changing tires or performing brake service can become an expensive hassle. This comprehensive kit gathers common spline, hex, and star-style keys into a single blow-molded case so mechanics and DIYers can match nearly any locking lug pattern found on aftermarket wheels. Each key is heat-treated chrome vanadium steel with a black oxide finish, built for repeated use in busy garages and mobile service vans.

Which lock styles and sizes are included in this set?

The set covers a broad selection of aftermarket security lug patterns, combining spline, hex, and star configurations to maximize fit coverage. Sizes are chosen to fit the most commonly used locking lug nuts, reducing the chance you'll need a separate specialty key.

• Spline keys: 5-spline 5/8", 6-spline 41/64" & 45/64", 7-spline 5/8", 11/16" & 3/4", 12-spline 11/16" & 13/16"
• Hex keys: 9/16", 12mm, 12mm fluted, 15mm
• Star keys: 8-point 7/16" & 5/8", 9-point 1/2", 10-point 1/2"
• Double-hex heads accept both 13/16" and 7/8" sockets or lug wrenches

How does the design protect wheels during removal?

Keys feature thin-walled sockets and an extra-long profile so the wrench engagement stays away from the wheel face, minimizing contact that can cause nicks or scratches. The double-hex head and narrow walls let you apply torque without forcing the wrench to press against delicate finishes.

• Thin socket walls reduce interference with wheel rims
• Extra length keeps tools clear of painted and machined surfaces
• Black oxide finish helps prevent corrosion that could stain wheels
• Double-hex heads allow use with common lug wrenches and sockets

Are these keys durable enough for professional use?

Yes — each key is made from heat-treated chrome vanadium steel chosen for toughness and wear resistance. The black oxide coating offers extra corrosion protection so the set holds up to road salts, shop fluids, and frequent handling.

• Heat-treated chrome vanadium for strength under torque
• Corrosion-resistant black oxide finish for long life
• Sized for repeatable engagement with common aftermarket locks
• Blow-molded case secures keys during transport and storage

What comes with the kit and how is it stored?

The 16-piece kit arrives in a compact blow-molded plastic case that keeps keys organized and protected. An application guide printed on the inner lid helps you identify the correct key quickly, saving time during on-vehicle service.

• 16 heat-treated keys covering spline, hex, and star styles
• Blow-molded case with molded pockets for each piece
• Inner lid application guide for fast identification and selection
• Double-hex heads compatible with 13/16" and 7/8" sockets

Who is this for: The Steelman Pro 78537 is built for professional mechanics, mobile tire techs, and ambitious DIYers who work on vehicles with aftermarket wheels. If you service a range of makes and wheel designs and want to avoid service delays caused by missing specialty keys, this set gives broad compatibility, durable construction, and a storage solution to keep key loss from interrupting your work.