Inner arm: Grip range from two (2) to seventeen and one-half (17.5) inches. The arm is designed to encircle the wheel radially, encapsulating both tire and inner wheel rim, without having to remove the wheel's hub cap.

Inner arm pressure stops: Constructed of 10 gauge x 1" die formed steel bar stock which is welded into place just behind the outside outer tip of the inner hook-arm. This stop prevents the inner arm from continuing to rotate inwardly inside the wheel cavity when the Secur-Bolt is tightened, by stopping the arm when the stop meets the backing plate, wheel drum or tie rod end. This stop reverses the pressure when it meets a stopping or pressure point. This reversal of pressure pivots the immobilizer body and outer arm with dome assembly automatically back into the outer wheel. The pressure securely clamps the dome against the outer wheel and/or hubcap, covering the lug nuts and preventing removal.

Inner arm assist spring: A plated assist spring is connected from the inside of the hook arm to the bolt box housing. This spring aids in the installation of the immobilizer by pulling the pivoting inner arm inward toward the tire, thus maintaining pressure against the wheel and holding the device in place during installation.

Rigidly affixed Outer Arm: Self adjusting telescoping head, no assembly required. Constructed of I" x 2" die formed rectangular steel tubing for superior strength and function. 3/16" x 14" steel bar tire stop is permanently affixed on the inner side of the outer arm near the bolt box. This stop creates a truss effect at the bend of the outer arm near the bolt box, thus increasing the arm's strength. The outer arm is permanently affixed to the bolt box with a continuous welded seam. A tamper-proof telescoping assembly with a hingedly affixed dome (with protective edge heading) is affixed to the outer arm. This assembly provides a 3" adjustment of the dome, which allows it to be centered on the wheel during application. The dome assembly is designed to clamp directly against the outer wheel or hubcap without damage to either. The dome assembly also prevents removal of the wheel by accessing the lug nuts.

Spring-Loaded "Grabber" Tire Stop: The "Grabber" spring-loaded tire and rim stop is a permanently affixed to the inner edge of the immobilizer's outer arm. It is constructed of a heavy duty spring permanently housed in a 1 1/4" x  1 1/4" tubular box steel welded housing. The "Grabber" Index Plate is permanently affixed over the spring assembly, and its raised steel indexing points meet with the tire's outer sidewall when the device is applied. As the Secur-Bolt is tightened, the spring assembly compresses as the outer arm is tightened against the outside edge of the wheel. The spring loaded index plate prevents lateral rotation of the immobilizer after application, and also prevents removal of the device even if the tire is deflated, since the spring mounted plate maintains constant pressure against the tire's outer sidewall. The "Grabber" plate will not damage the tire's sidewall during installation.

2. Dome Protective Trim: Durable metal reinforced protective vinyl heading prevents damage to the wheel or hubcap.

3. Dome Hinge Assembly: 3/16" x 2" die formed steel bar hinge assembly is permanently welded to center top of dome. This tamper-proof assembly allows the dome to pivot or tip side to side automatically during the immobilizer's installation.
This action provides a snug fit against the outer wheel or hubcap, preventing removal. This also aids in centering the dome.

4. Dome Telescoping Assembly: Telescoping dome assembly sleeve is permanently affixed to the hinge at the dome. Sleeve is constructed of die formed 12 gauge steel, punched and overlaid with all seams welded. It is held in place on the outer arm by a hardened stop screw which can only be accesses or removed when the immobilizer is not installed on a vehicle. Provides easy maintenance, repair or change of dome assembly size.

2. Three-quarter inch (3/4") stainless steel threaded nut and custom machined 3/4" threaded, hardened and plated Secur-bolt provides gall resistance and superior locking performance. When tightened the bolt applies leveraged pressure against the inner immobilizer arm and pivots into a closed position around the vehicle's wheel. The custom machined offset lug at the bolt's end prevents removal without a Secur-Key.

3. A custom Secur-Bolt Key is provided with each immobilizer on smaller orders and fits the custom machined head of the Secur-Bolt, which is designed to prevent unauthorized removal of the immobilizer should either a padlock not be used or a used padlock be defeated. On larger orders, one Secur-Key is provided for every three (3) devices. Optional padlock, with or without lock cover is used for additional security and protection only. Optional padlock is recommended.