XUNJIAJIE 4pcs Heavy Duty Brass Internal Wheel Knuckle Weight Counterweight for TRX4 1/10th RC Crawler Model Car

Amazing value for money compared to many other sellers. Arrived fast. All threads well machined. Although, go super easy when installing as it's a fine threaded M2.5 so you could easily strip it going in a bit hard. Just go easy and do not force them. Do not use power tools and just take your time.