Force brand, original from Taiwan, professional tools. 
Simple easy operation to remove or tighten nuts, bolts or screws. Instant impact force loosens rusted or frozen screws without damaging them.
When the impact resistant handle is struck with a hammer the downward force is converted by the impact driver’s internal mechanism into a powerful high torque screwdriver rotation action. Ideal for ensuring fasteners are securely tightened and for freeing stuck fasteners. Hex drive nose pieces can be removed to allow use with 1/2” square drive impact sockets.
17pc set kept in a solid PVC box with following items:

• Impact driver
• 5/16" bit: Phillips PH.2; PH.3 (36mmL)
• 5/16" bit: Pozidriv PZ.2; PZ.3 (36mmL)
• 5/16" bit: Slotted 9; 11mm (36mmL)
• 5/16" bit: Star T25; T30; T40; T45; T50 (35mmL)
• 5/16" bit: Hex 6; 8; 10 mm (36mmL)
• Impact bit holder 1/2"DR.x5/16"
• Bit adaptor 5/16"Hex-3/8"Sq.