Countersink for Screws GEKO G64985 — 3/8 mm Cutting Diameter

GEKO G64985 countersink for screws is a rotary cutting tool with a 3/8 mm cutting diameter designed to create clean recessed holes so screw heads sit flush with or below the work surface. The bit is intended for use with hand drills or drill presses and is suitable for softer materials such as timber and soft plastics, enabling accurate, repeatable countersinking for woodworking, joinery and general fastening tasks.

Advantages

The countersink delivers a precise 3/8 mm cutting diameter for consistent recess depth and minimal tear-out on edges. Its geometry reduces walking at start-up, improving accuracy when used with hand drills or bench-mounted equipment. The tool enables quick preparation for flat-head and countersunk screw installations, saving time compared with manual chiselling and ensuring a cleaner final appearance.

Suitable for

• Creating recessed holes for screw heads in softwood and hardwood
• Preparing screw seats in soft plastics and composite materials
• Woodworking and joinery tasks where flush screw fitting is required
• General fastening work using hand drills or drill presses

Key specifications

• Cutting diameter: 3/8 mm
• Tool type: rotary countersink for screws
• Intended materials: wood, soft plastics and similar materials
• Suitable mounting: hand drill or drill press

How to use

Secure the workpiece to prevent movement. Fit the countersink into the drill chuck and tighten securely. Start drilling at low speed to establish the location and then increase speed as appropriate for the material. Apply steady, even pressure until the desired recess depth is achieved. Withdraw the tool while the drill is still turning to reduce burrs. If using a drill press, set the depth stop to obtain consistent, repeatable recesses.

Usage recommendations

For best results, use with sharp drill bits and moderate speed settings when working on wood or plastics; test on a scrap piece to confirm recess diameter and depth before working on the final component.