Industrial quality impact driver with switchable forward and reverse screwdriver rotation. 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. 40-Piece Impact Driver Set 1/2” square to 5/16” hexagon bit adaptor 1/2” square to 3/8” hexagon bit adaptor. 80mm x 3/8” Hexagon bits, Hexagon: 8mm, 6mm, TX: Tx40, Tx45, Tx50, Crosspoint: No.2, No.3, Slotted: 8mm and 10mm. 35mm x 3/8” Hexagon bits, Hexagon: 4mm, 5mm, 6mm, 7mm, 8mm, TX: Tx20, Tx25, Tx30, Tx40, Tx45, Tx50, Crosspoint: No.1, 2, 3 & 4, Slotted: 5mm, 6mm, 8mm, 10mm, 12mm. 30mm x 5/16” Hexagon bits, Hexagon: 10mm, 12mm, TX: Tx55, Spline: 5mm, 6mm, 8mm, 10mm, and 12mm.