MDRQ908 – Ratcheting Quick Chuck Bits Driver Set For 1/4 hexagon bits. Twist reverse for ratcheting in both directions. Fixed position as an alternative to ratchet action. Quick chuck for quick and easy bit changing. Ergonomically designed bi-material handle. Blade Length: 30mm Overall Length: 142mm Weight: 108g Drive: 1/4 Hex 25mm Bits: Flat 5.7mm PH1 PH2 PZ1 PZ2 1/4 Hex x 1/4 Square Adaptor