◆ Handle hole size → 4x7mm, compatible with Shimano reels! (This is a foreign-made product, so you may need to adjust the hole clearance. Please understand.) ◆ Please allow for a 1-2mm error due to being a foreign-made product. ◆ Compatible with Shimano bait reels (Metanium, Aldebaran, Scorpion, Exsence, Calcutta Conquest, Antares, SLX, etc.) and other models with the same specifications. ◆ Weight: Approximately 8-9g ◆ The shaft axis of the knob attachment part is 4mm, so Shimano A-type and Daiwa S-type knobs can be installed. Regarding knob installation, the size and number of bearings, and the number of shims will vary depending on the knob being installed. Please prepare the necessary sizes and quantities yourself. ※ Bearings, etc., are not included. ※ If the knob does not rotate after installation → The screw may be tightened too much, stopping the knob's rotation. This can be resolved by loosening the screw, reducing the number of shims, or changing to thinner bearings. ※ This is a personal sale, so we will ship with simple packaging. Thank you for your understanding.