Big Kid Blocks Heavy Hitter - Sphere Style Handle KitBig Kid Blocks are an industry leader in the automotive industry. Their custom sanding blocks are the best in the industry. Big Kid Blocks Heavy Hitter Block Kit is a 1 2 thick block set including three white acrylic blocks (24, 18 & 11). Each block is topped with sphere handles that are great for large areas when you need a rigid block with a little bit of flex. SPECIFICATIONS Includes: 3 x white 1 2" (approx. 1. 3cm) thick acrylic blocks 24 (approx.