Pivot shoe lock for vinyl tilt window

This looks like a 15-195 T-Lock Shoe. However, ours lack that groove in the stem that your shoe possesses. This groove interfaces with a similar groove in your window's channel balances. Both our T-Lock Shoes and balances lack this characteristic groove; because of this, I am afraid you'll need to replace not just the shoe, but the balances as well. This would be our Series 795 Channel Balance. The good news it these balances come assembled with this T-Lock Shoe by default. This blog article here goes into more detail about this product.