Function: used to check the straightness of the blank/blank (roll the blank/blank separately to see if there is any shaking. Uses: //snooker cue/cue cue straightness tester for cue inspection. Uses: Great accessories for pool cue repair/maintenance and care. Portable: light weight, compact size, easy to carry and use. High Quality: Made of high quality plastic and iron material, sturdy and durable for long-term use. Condition: Item Type: Horizontal Plane Straightness Checker Weight: . 98 grams Size: about 8cm Colour:black Material:iron+plastic Package Contents: 2 x Horizontal straightness checker Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.