Clap the clapper stick like a pro at the start of a video shoot to synchronize the pictures with the sound. Easily fill in the “Head ID” and other information on the clapperboard. It’s as easy to wipe with the magnetic eraser and the cleaning cloth. Note: Do not use oil based pens because they leave permanent marks on the plastic board A must have for filmmaking, music videos, short videos, advertising, studio shooting, and other video production work. The L shaped Hex key can be used to adjust the tightness of screws on the clapper stick. Specifications Material: Wood, plastic, magnet Color: Black Dimensions: 11.8” x 9.8” x 1.4” / 30 x 25 x 3.5cm Weight: 18.34oz / 520g Package Contents 1 x Clapperboard 2 x Custom Water Based Pens 1 x Magnetic Eraser 1 x Cleaning Cloth 1 x L Shaped Hex Key