13-Piece Ball Hex Key Set Brushes Hardened & tempered chrome carbon

Hardened & tempered chrome carbon steel blade for superior edge retention

Single concave flute design creates perfectly round holes in thin materials including steel

lasting up to 40X longer than standard carbide metal cutting saw blades

Cast-metal case is durable and suitable for heavy-duty use

from 5/8" to 6" diameter

13-Piece Ball Hex Key Set Brushes Hardened & tempered chrome carbonIncludes: . 050", 1 16", 5 64", 3 32", 7 64", 1 8", 9 64", 5 32", 3 16", 7 32", 1 4", 5 16" & 3 8". Turns 360 degrees at up to 25 degree angle. Extra torque 8650 chrome nickel alloy, heat treated for maximum strength. Black oxide finish to resist rust. Made in USA.