This toy can go from so light it tickles to very heavy sensation if a lot of pressure is applied. 

Total Length: 6.75" (17.14 cm)
Handle Length: 5" (12.7 cm)
Wheel Diameter: 1.25" (3.2 cm)
Spikes: 22
Spike Length: 0.2" (5 mm)
Material: Stainless Steel
Weight: 1.8 oz (50 g)