Impact GOLD Insert Bits begin with high-quality steel engineered for use with impact drivers. To help withstand the increased impact energy of the most demanding fastening applications, Impact GOLD Insert Bits features Xtreme Torsion Technology, which allows the torsion section of the bit to flex under load and reduce pressure off of the bit tip. Each Impact GOLD bit is subject to a rigorous five-stage manufacturing process which includes a correction stage engineered to deliver consistent and superior fitment, bit after bit. Makita Impact GOLD is designed exclusively for use with high-torque impact drivers, and it is ideal for the most demanding jobs including deck building, framing, installing plywood subfloor, and more. Precision-Fit Tip prevents "cam-out" and stripping. Extends bit life 10X longer than standard bits. Combine an Impact GOLD Bit with an Impact GOLD Insert Bit Holder and achieve up to 15X longer life. Impact GOLD Torsion Magnetic Insert Bit Holders feature Xtreme Torsion Technology, which allows the torsion section of the bit holder to flex under load and take pressure off of the bit tip for increased durability in high torque applications. The two-piece design is engineered to allow the torsion technology to fully activate. The Makita Impact GOLD Torsion Magnetic Bit Holders are ideal for use with Impact GOLD Insert Bits. Includes:(1) #1 1" Phillips Insert Bit, (3) #2 1" Phillips Insert Bit, (1) #3 1" Phillips Insert Bit, (1) #2 1" Square Insert Bit, (1) #3 1" Square Insert Bit, (1) #15 1" Torx Insert Bit, (1) #20 1" Torx Insert Bit, (1) #25 1" Torx Insert Bit, (1) Ultra Magnetic Torsion Insert Bit Holder and Case.