Small Tough Case. System Set. Connectable Case allows multiple sets to be stacked and locked together. TSTAK compatible to hold all your accessory sets in one place. Compatible with the TSTAK system via the Caddy and Large Tough Case. Easy bit removal and retention for user convenience. Bits lock into place to prevent them falling out when not in use. Extreme Impact Ready. Optimised Tip Geometry for full fitment in the fastener and reduced cam-out. Full-fit head eliminates wobble and screw head rounding. CNC Machined Optimised Torsion Zone for greater bit strength and longer life. Optimised torsion zone maximises bit life and turning force even in the most demanding applications. Contoured area of the bit flexes with the torque of the impact driver to absorb torque peaks and protect the bit for longer life. DEWALT branded torsion zone. Includes a torsion zone bit holder for use with 25mm screwdriver bits. Longer life on 25mm bits when used in a torsion zone bit holder. Includes a cleanable nut driver.