Milwaukee Shockwave Impact Duty magnetic nut drivers are engineered for extreme durability and up to 10X life. Made from proprietary steel and heat-treated to control hardness, the Shockwave Impact Duty magnetic nut drivers feature a powerful magnet allowing for a secure grip and unyielding bit engagement. The bits feature color-coded rings for quick and easy size identification and a chamferred edge to allow for fastening in tight spaces. No. 49-66-4512: Size: 1/4", Length: 1-1/2", Shank Size: 1/4" Hex Insert, Magnetic: Yes, Pkg Qty: 3, Package Type: Clamshell No. 49-66-4513: Size: 5/16", Length: 1-1/2", Shank Size: 1/4" Hex Insert, Magnetic: Yes, Pkg Qty: 3, Package Type: Clamshell No. 49-66-4515: Size: 3/8", Length: 1-1/2", Shank Size: 1/4" Hex Insert, Magnetic: Yes, Pkg Qty: 3, Package Type: Clamshell No. 49-66-4516: Size: 7/16", Length: 1-1/2", Shank Size: 1/4" Hex Insert, Magnetic: Yes, Pkg Qty: 3, Package Type: Clamshell No. 49-66-4517: Size: 1/2", Length: 1-1/2", Shank Size: 1/4" Hex Insert, Magnetic: Yes, Pkg Qty: 3, Package Type: Clamshell No. 49-66-4502: Size: 1/4", Length: 1-7/8", Shank Size: 1/4" Hex Power, Magnetic: Yes, Pkg Qty: 1, Package Type: Clamshell No. 49-66-4702: Size: 1/4", Length: 1-7/8", Shank Size: 1/4" Hex Power, Magnetic: Yes, Pkg Qty: 1 No. 49-66-4503: Size: 5/16", Length: 1-7/8", Shank Size: 1/4" Hex Power, Magnetic: Yes, Pkg Qty: 1, Package Type: Clamshell No. 49-66-4703: Size: 5/16", Length: 1-7/8", Shank Size: 1/4" Hex Power, Magnetic: Yes, Pkg Qty: 1 No. 49-66-4505: Size: 3/8", Length: 1-7/8", Shank Size: 1/4" Hex Power, Magnetic: Yes, Pkg Qty: 1, Package Type: Clamshell No. 49-66-4506: Size: 7/16", Length: 1-7/8", Shank Size: 1/4" Hex Power, Magnetic: Yes, Pkg Qty: 1, Package Type: Clamshell No. 49-66-4522: Size: 1/4", Length: 1-7/8", Shank Size: 1/4" Hex Power, Magnetic: Yes, Pkg Qty: 3, Package Type: Clamshell No. 49-66-4523: Size: 5/16", Length: 1-7/8", Shank Size: 1/4" Hex Power, Magnetic: Yes, Pkg Qty: 3, Package Type: Clamshell No. 49-66-4525: Size: 3/8", Length: 1-7/8", Shank Size: 1/4" Hex Power, Magnetic: Yes, Pkg Qty: 3, Package Type: Clamshell No. 49-66-4705: Size: 3/8", Length: 1-7/8", Shank Size: 1/4" Hex Power, Magnetic: Yes, Pkg Qty: 1 No. 49-66-4526: Size: 7/16", Length: 1-7/8", Shank Size: 1/4" Hex Power, Magnetic: Yes, Pkg Qty: 3, Package Type: Clamshell No. 49-66-4706: Size: 7/16", Length: 1-7/8", Shank Size: 1/4" Hex Power, Magnetic: Yes, Pkg Qty: 1 No. 49-66-4532: Size: 1/4", Length: 2-9/16", Shank Size: 1/4" Hex Power, Magnetic: Yes, Pkg Qty: 1, Package Type: Clamshell No. 49-66-4732: Size: 1/4", Length: 2-9/16", Shank Size: 1/4" Hex Power, Magnetic: Yes, Pkg Qty: 1 No. 49-66-4533: Size: 5/16", Length: 2-9/16", Shank Size: 1/4" Hex Power, Magnetic: Yes, Pkg Qty: 1, Package Type: Clamshell No. 49-66-4733: Size: 5/16", Length: 2-9/16", Shank Size: 1/4" Hex Power, Magnetic: Yes, Pkg Qty: 1 No. 49-66-4535: Size: 3/8", Length: 2-9/16", Shank Size: 1/4" Hex Power, Magnetic: Yes, Pkg Qty: 1, Package Type: Clamshell No. 49-66-4735: Size: 3/8", Length: 2-9/16", Shank Size: 1/4" Hex Power, Magnetic: Yes, Pkg Qty: 1 No. 49-66-4536: Size: 7/16", Length: 2-9/16", Shank Size: 1/4" Hex Power, Magnetic: Yes, Pkg Qty: 1, Package Type: Clamshell No. 49-66-4537: Size: 1/2", Length: 2-9/16", Shank Size: 1/4" Hex Power, Magnetic: Yes, Pkg Qty: 1, Package Type: Card No. 49-66-4736: Size: 7/16", Length: 2-9/16", Shank Size: 1/4" Hex Power, Magnetic: Yes, Pkg Qty: 1