The Prop ClubŪ inhibits flight by creating an out-of-balance condition. Made of tempered steel, The Prop ClubŪ is an anti-theft device that locks securely onto the propeller at the hub via a four-digit combination. The small Prop ClubŪ has a compressed opening range of 4-1/4" to 5-1/2"(wt: 2.4 lbs) and the large Prop ClubŪ has a compressed opening range of 6" to 8"(wt: 2.8 lbs). As long as the Prop ClubŪ can attach to the base of the prop within this range, and the closed dimensions are smaller than the widest part of the prop, The Prop ClubŪ will remain securely attached to the propeller hub. It will not work on props that maintain the same width from base to tip.
Pilot Supplies - Security, Aircraft - Prop ClubŪ 
