Four piece drill bit set with built in countersink and counterbore capability for screw sizes 5, 6, 8, 10 and 12 Key features and benefits - Multi size coverage: includes bits for drilling holes sized to accept screws 5, 6, 8, 10 and 12, reducing the need to switch between different tools - Countersink and counterbore function: special designed steel counter sleeve allows you to countersink or counter bore holes for a flush, professional finish - Adjustable depth control: counter sleeve depth can be set and adjusted with an Allen wrench for consistent results across projects - Quick change fit: standard hex shank is compatible with quick change systems for fast bit changes - Durable construction: steel counter sleeve provides reliable performance and long wear in everyday use What it enables - Precise hole preparation for flush screw heads, improving appearance and join strength - Consistent hole depth across multiple screws and workpieces with adjustable sleeve depth - Efficient workflow with quick change hex shank compatibility and a compact four piece set Recommended applications - Wood furniture assembly where screw sizes 5 to 12 are used and flush head appearance matters - Cabinet making and shelving installation requiring clean countersunk or counterbored holes - DIY projects and home improvement tasks that involve mounting hardware with common screw sizes Compatibility and performance notes - Works with standard hex shanks and is designed for quick tool changes - Made with a steel counter sleeve to provide durable countersinking or counterboring operations This description preserves the original function and specifications: a four piece set providing drill bits for screw sizes 5, 6, 8, 10 and 12, featuring a steel counter sleeve for countersinking or counterboring, adjustable sleeve depth with an Allen wrench, and a standard hex shank that is quick change compatible.