Item Type: Ball Straightness Tester Material: 6063 Aluminum Gross Weight: 173g / 6.1oz Product Size: Length: Approx.6.7cm / 2.6in, Width: Approx.2.1cm / 0.8in Package List 2 x Detector 1 x Storage Bag 1Purpose: This billiard straightness detector is mainly used to detect the straightness of the club, so as to adjust the direction in time. 2For Billiards: This pool cue straightness checker is mainly used for billiards, snooker cues, cue inspection tools, very suitable for playing billiards. 3Small and Lightweight: This billiard ball straightness detector product is small in size and light in weight, so it can be carried around and easily stored. 4Durable: This straightness detector is made of selected 6063 aluminum material, which is wear resistant, not easy to damage, and durable. 5More Situations Applicable: This billiard cue straightness detector can not only be used for playing billiards at home, but also can be used in public places such as billiard halls and billiard clubs.