Hook and loop strap allows easy application and adjustments. Blocks the MP joints and IP joints of the fingers and thumb without stressing the therapist's hands. Use for post-surgery and for treating PIP, DIP, MP and IP joint injuries and scar adhesions. Easily adjustable. Consists of a blocker board with comfortable padding, a screw-on immobilization bar with two contoured surfaces, an anchor strap and two quick-release bolts. Screw-on immobilization bar accommodates most hand sizes for MP, PIP or DIP blocking exercises. Convenient for home exercise programs. One size fits all. Reversible to accommodate both hands.