Specifications Name: Adjustable Batch Head Limit Clutch Size:68mm/2.68inch Handle diameter:6.35mm/0.25inch Features: Automatic separation and calibration of screws Applicable equipment: Electric screwdrivers/lithium drills, etc Usage: It is used for gypsum board ceilings, aluminum-plastic composite boards, melamine boards, woodwork veneer panels, etc Description 7-Position Precision Depth Stop: Easily adjust the collar to one of seven settings for a precise depth between 2-8mm. Eliminate guesswork and ensure every screw is driven to the exact same depth, perfect for hinge installation, cabinetry, and delicate woodworking. Automatic Screw Release: The innovative indexing collar mechanism stops the bit rotation the moment it touches the work surfacing. This prevents over-driving and instantly releases the screw, saving you time and effort while protecting your materials from damage. Powerful Magnetic Holder: Features an integrated strong magnet that securely grips screws. This prevents them from falling off the bit, allowing for easy one-handed operation and starting screws in tight or awkward spaces. Non-Slip Universal Hex Shank: The 1/4" (6.35mm) hex shank ensures a secure, slip-free grip in any compatible chuck. It provides wide compatibility with cordless drills, electric drills, pneumatic screwdrivers, and power drivers. Package 1PC Adjustable Batch Head Limit Clutch