DURATECH 121-Piece Mechanics Tool Kits Material: Alloy Steel Head Style: Hex Finish Type: Powder Coated Item Weight: 2.87 pounds Size: 1/4'', 3/8'' & 1/2'' Dr. Breaker Bars Includes: 1/4'', 3/8'' & 1/2'' Drive Breaker Bars Heavy Duty High Quality Made of premium high-strength alloy steel, the heavy duty breaker bar kit features a corrosion-resistant forged and hardened chrome alloy steel construction for maximum strength and longer service life(Torque Range:1/4” 56.5nm, 3/8” 203.4nm, 1/2” 508.5nm) Flexible Design The 180-degree rotatable heads design for maximum versatility delivers torque at multiple angles for maximum reaching around tight spaces and generating optimized leverage Tight Holding Spring-loaded detent ball allows your sockets to stay on tight while loosening tough bolts and lug nuts so that you can never worry about dropped socket again Spring-loaded Detent Ball Allows your sockets to stay on tight while loosening tough bolts and lug nuts so that you can never worry about dropped socket again 180-degree Rotatable Head Delivers torque at multiple angles for maximum reaching around tight spaces and generating optimized leverage Premium High-strength Alloy Steel Features a corrosion-resistant forged and hardened chrome alloy steel construction for maximum strength and longer service life