The Nemesis Plus SCM anti-theft clamp from Fullstop is pre-eminently the best way to prevent theft of your RV. You easily attach the orange parking clamp to your wheel, put the lock on it and you are assured that no one will take your vehicle. The wheel clamp has a compact and lightweight design. In addition, it features an anti-pick 9 pin Lowe & Fletcher lock. Features: Easy and quick to install, also for aluminum rims from 10-20" Compact design specially developed for motorhomes, including handy storage bag Nemesis Plus SCM: wheel clamp according to a new patented design Standard including 14 mm x 1.5 mm / 60° conical wheel bolt NOTE: Always remove the wheel clamp before driving!Specifications general: Color: orange Material: steel SCM certification: yes Lock: Anti-pick 9 pin Lowe & Fletcher lock Weight: approx. 6150 grams Specifications dimensions: Wheel clamp dimensions: 53.5 x 45 x 15 cm (L x W x H) Package dimensions: 54 x 11.8 x 28 cm (L x W x H) Wheel size: 10-20 inch Wheel bolt size: 1.5 x 14 mm Wheel bolt seat: conical (60°) Contents: 1 Wheel clamp 3 Wrenches 1 Wheel bolt 1 Storage bag Instructional videos: https://www.youtube.com/watch?v=Q1Qsb5Ehi3c https://www.youtube.com/watch?v=ZMX_P2gr2GE Watch the video at the link below to see how to determine which replacement bolt you need if you have purchased a Fullstop Security Nemesis Plus, Nemesis Ultra or Gemini Twin Axle Wheel Lock and have found that the wheel bolts provided do not fit. This may be due to different wheel mounting, thread size and/or bolt length: https://www.youtube.com/watch?v=4F1i-rDQ-RQ