HASAOMOI metric Woodruff Key Assortment Kit 530pcs — 37 Sizes, Carbon Steel & Heat-Treated

HASAOMOI's 530-piece metric Woodruff key assortment supplies a complete selection of carbon-steel half-moon and round-ended keys in 37 sizes for repair, fabrication, and machinery maintenance.

Keep the right key on hand for shafts, pulleys, sprockets and couplings: this kit bundles both half-moon (Woodruff) and round-ended feather keys made from high-hard carbon steel, sorted into a compact plastic case. The pieces are machined for consistent dimensions and corrosion resistance, so you can quickly match a size and get equipment running again without improvising or cutting stock on the spot.

What sizes does the kit include and how many pieces of each type?

The assortment covers a broad metric range so you rarely need to source individual stock. Sizes span from small 8mm options up to larger 30mm parts, with separate counts for half-moon and round-ended pieces to suit different slot types.

• 530 pieces total across 37 distinct metric sizes
• Approximately 240 half-moon (Woodruff) keys in 16 sizes
• About 290 round-ended feather keys in the remaining sizes
• Size range accommodates common automotive and machinery dimensions

How durable and precise are these carbon steel keys?

Each key is stamped from high-hard carbon steel and heat-treated for strength and wear resistance. Manufacturing tolerances are controlled so the keys seat securely in keyways and minimize play, improving torque transmission and component alignment.

• High-hard carbon steel for tensile strength and durability
• Heat-treated surface for wear resistance and longer service life
• Precision dimensions to fit standard metric keyways reliably
• Corrosion-resistant finish reduces surface rust in storage and use

How is the kit organized and how does it help workflow?

The keys arrive sorted in a rugged plastic box with labeled compartments so you can identify sizes at a glance. Neat organization saves shop time and keeps small parts from scattering during maintenance tasks, making the kit ideal for mobile toolkits or bench storage.

• Transparent, durable plastic case with numbered compartments
• Individual slots prevent mixing and speed size selection
• Compact footprint fits toolbox drawers or work benches
• Portable for field service or on-site repairs

Which applications are these keys suitable for?

These keys are commonly used where a secure mechanical connection between a shaft and a hub is required. They are suitable for light- to medium-duty automotive repairs, industrial machinery, power tools and DIY mechanical projects where standard metric key sizes are specified.

• Shaft-to-pulley, sprocket, and hub assemblies
• Small engines, lawn equipment and garden machinery repairs
• Machine shop fixtures, jigs, and maintenance spares
• Restoration and hobby projects requiring metric keys

Who is this for? The HASAOMOI 530-piece metric kit fits the needs of mechanics, maintenance technicians, machine shop owners, and serious DIY enthusiasts who want a comprehensive, ready-to-use supply of Woodruff and feather keys. If you frequently service metric equipment, perform on-site repairs, or maintain a well-stocked toolkit, this assortment reduces downtime and avoids repeated trips for single pieces.