Hey RC enthusiasts! This Tamiya TT02 Differential Locking Block is exactly what you need to upgrade your ride. Part number 54649, this is from Tamiya's Hop Up Options line (number 1699 OP.1649 if you're keeping track). Basically, it locks your differential solid - perfect for when you want maximum traction and straight-line stability. Whether you're building a drift car or just want better control on various surfaces, this little block makes a huge difference. Super easy to install on your TT02 chassis. Great for teens and adults who are into RC modeling. Tamiya quality through and through - you know it's going to fit perfectly and perform exactly as expected. If you're serious about tuning your TT02, this is one of those essential upgrades that really transforms how your car handles. No more wheel spin issues, just pure controlled power to the ground. Perfect for both beginners and experienced RC hobbyists looking to get that competitive edge!