What is this?These 3.7mm cross opening switch tip knobs are designed as replacement parts for LP electric guitars. These guitar knobs fit standard 3.7mm cross toggle switches and fit both 3-way and 5-way pickup selector switches.What will I get?Installation hole style: 3.7mm Cross Opening;Installation hole size: Dia. 3.7mm;Size: 8.7x14.5mm/0.34x0.57" (DxH);Material: Plastic;Color: Black;Package includes: 2 pcs.Is there any advantages of the product?Easy to use: Our switch tip knobs help guitarists switch pickups more conveniently, saving effort and protecting their fingers.Firm connection: Our switch tip knobs feature specially designed cross opening, which are hard to fall off and can withstand strong impacts.Fine material: Our switch tip knobs are made of durable plastic with bright colors, adding a characteristic to your guitar.